diff --git a/app/Http/Middleware/Range.php b/app/Http/Middleware/Range.php
index 71578d4114..6206520be5 100644
--- a/app/Http/Middleware/Range.php
+++ b/app/Http/Middleware/Range.php
@@ -74,8 +74,8 @@ class Range
             }
 
             $today     = today(config('app.timezone'));
-            $start     = app('navigation')->updateStartDate($viewRange, $today);
-            $end       = app('navigation')->updateEndDate($viewRange, $start);
+            $start     = app('navigation')->updateStartDate((string) $viewRange, $today);
+            $end       = app('navigation')->updateEndDate((string) $viewRange, $start);
 
             app('session')->put('start', $start);
             app('session')->put('end', $end);
diff --git a/app/Models/RecurrenceRepetition.php b/app/Models/RecurrenceRepetition.php
index 2171ee76d4..a40ae9bc4f 100644
--- a/app/Models/RecurrenceRepetition.php
+++ b/app/Models/RecurrenceRepetition.php
@@ -25,12 +25,13 @@ namespace FireflyIII\Models;
 
 use Carbon\Carbon;
 use Eloquent;
+use FireflyIII\Support\Models\ReturnsIntegerIdTrait;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Database\Query\Builder;
-use FireflyIII\Support\Models\ReturnsIntegerIdTrait;
+
 /**
  * FireflyIII\Models\RecurrenceRepetition
  *
@@ -38,11 +39,11 @@ use FireflyIII\Support\Models\ReturnsIntegerIdTrait;
  * @property Carbon|null     $created_at
  * @property Carbon|null     $updated_at
  * @property Carbon|null     $deleted_at
- * @property int      $recurrence_id
+ * @property int             $recurrence_id
  * @property string          $repetition_type
  * @property string          $repetition_moment
- * @property int|string      $repetition_skip
- * @property int|string      $weekend
+ * @property int             $repetition_skip
+ * @property int             $weekend
  * @property-read Recurrence $recurrence
  * @method static \Illuminate\Database\Eloquent\Builder|RecurrenceRepetition newModelQuery()
  * @method static \Illuminate\Database\Eloquent\Builder|RecurrenceRepetition newQuery()
@@ -104,4 +105,24 @@ class RecurrenceRepetition extends Model
             get: static fn($value) => (int)$value,
         );
     }
+
+    /**
+     * @return Attribute
+     */
+    protected function repetitionSkip(): Attribute
+    {
+        return Attribute::make(
+            get: static fn($value) => (int)$value,
+        );
+    }
+
+    /**
+     * @return Attribute
+     */
+    protected function weekend(): Attribute
+    {
+        return Attribute::make(
+            get: static fn($value) => (int)$value,
+        );
+    }
 }
diff --git a/app/Models/TransactionJournalMeta.php b/app/Models/TransactionJournalMeta.php
index cbb17514d0..8dd99d280c 100644
--- a/app/Models/TransactionJournalMeta.php
+++ b/app/Models/TransactionJournalMeta.php
@@ -95,7 +95,7 @@ class TransactionJournalMeta extends Model
     {
         $data                     = json_encode($value);
         $this->attributes['data'] = $data;
-        $this->attributes['hash'] = (string) hash('sha256', $data);
+        $this->attributes['hash'] = hash('sha256',(string)  $data);
     }
 
     /**
diff --git a/app/Repositories/Bill/BillRepository.php b/app/Repositories/Bill/BillRepository.php
index 7425867306..029eb1e1c2 100644
--- a/app/Repositories/Bill/BillRepository.php
+++ b/app/Repositories/Bill/BillRepository.php
@@ -653,7 +653,7 @@ class BillRepository implements BillRepositoryInterface
         return $this->user->bills()
                           ->where('active', true)
                           ->orderBy('bills.name', 'ASC')
-                          ->get(['bills.*', DB::raw('((bills.amount_min + bills.amount_max) / 2) AS expectedAmount'),]);
+                          ->get(['bills.*', DB::raw('((bills.amount_min + bills.amount_max) / 2) AS expectedAmount'),]); // @phpstan-ignore-line
     }
 
     /**
diff --git a/app/Repositories/Journal/JournalCLIRepository.php b/app/Repositories/Journal/JournalCLIRepository.php
index 8f37b8f1fd..f724df374e 100644
--- a/app/Repositories/Journal/JournalCLIRepository.php
+++ b/app/Repositories/Journal/JournalCLIRepository.php
@@ -201,7 +201,7 @@ class JournalCLIRepository implements JournalCLIRepositoryInterface
     {
         $query      = TransactionJournal::leftJoin('transactions', 'transaction_journals.id', '=', 'transactions.transaction_journal_id')
                                         ->groupBy('transaction_journals.id');
-        $result     = $query->get(['transaction_journals.id as id', DB::raw('count(transactions.id) as transaction_count')]);
+        $result     = $query->get(['transaction_journals.id as id', DB::raw('count(transactions.id) as transaction_count')]); // @phpstan-ignore-line
         $journalIds = [];
         /** @var stdClass $row */
         foreach ($result as $row) {
diff --git a/app/Repositories/Recurring/RecurringRepository.php b/app/Repositories/Recurring/RecurringRepository.php
index 4ee6747606..052a129688 100644
--- a/app/Repositories/Recurring/RecurringRepository.php
+++ b/app/Repositories/Recurring/RecurringRepository.php
@@ -69,9 +69,9 @@ class RecurringRepository implements RecurringRepositoryInterface
         // if not, loop set and try to read the recurrence_date. If it matches start or end, return it as well.
         $set
             = TransactionJournalMeta::where(static function (Builder $q1) use ($recurrence) {
-                $q1->where('name', 'recurrence_id');
-                $q1->where('data', json_encode((string)$recurrence->id));
-            })->get(['journal_meta.transaction_journal_id']);
+            $q1->where('name', 'recurrence_id');
+            $q1->where('data', json_encode((string)$recurrence->id));
+        })->get(['journal_meta.transaction_journal_id']);
 
         // there are X journals made for this recurrence. Any of them meant for today?
         foreach ($set as $journalMeta) {
@@ -495,6 +495,10 @@ class RecurringRepository implements RecurringRepositoryInterface
         /** @var Preference $pref */
         $pref     = app('preferences')->getForUser($this->user, 'language', config('firefly.default_language', 'en_US'));
         $language = $pref->data;
+        if (is_array($language)) {
+            $language = 'en_US';
+        }
+        $language = (string)$language;
         if ('daily' === $repetition->repetition_type) {
             return (string)trans('firefly.recurring_daily', [], $language);
         }
@@ -532,6 +536,9 @@ class RecurringRepository implements RecurringRepositoryInterface
             //
             $today       = today(config('app.timezone'))->endOfYear();
             $repDate     = Carbon::createFromFormat('Y-m-d', $repetition->repetition_moment);
+            if(false === $repDate) {
+                $repDate = clone $today;
+            }
             $diffInYears = $today->diffInYears($repDate);
             $repDate->addYears($diffInYears); // technically not necessary.
             $string = $repDate->isoFormat((string)trans('config.month_and_day_no_year_js'));
diff --git a/app/Repositories/UserGroup/UserGroupRepository.php b/app/Repositories/UserGroup/UserGroupRepository.php
index a5fcc65dcd..a720bf90dc 100644
--- a/app/Repositories/UserGroup/UserGroupRepository.php
+++ b/app/Repositories/UserGroup/UserGroupRepository.php
@@ -206,12 +206,15 @@ class UserGroupRepository implements UserGroupRepositoryInterface
     {
         $owner = UserRole::whereTitle(UserRoleEnum::OWNER)->first();
         app('log')->debug('in update membership');
+        /** @var User|null $user */
         $user = null;
         if (array_key_exists('id', $data)) {
+            /** @var User|null $user */
             $user = User::find($data['id']);
             app('log')->debug('Found user by ID');
         }
         if (array_key_exists('email', $data) && '' !== (string)$data['email']) {
+            /** @var User|null $user */
             $user = User::whereEmail($data['email'])->first();
             app('log')->debug('Found user by email');
         }
diff --git a/app/Services/FireflyIIIOrg/Update/UpdateRequest.php b/app/Services/FireflyIIIOrg/Update/UpdateRequest.php
index 58ca8c8db3..fa683b1e34 100644
--- a/app/Services/FireflyIIIOrg/Update/UpdateRequest.php
+++ b/app/Services/FireflyIIIOrg/Update/UpdateRequest.php
@@ -123,10 +123,15 @@ class UpdateRequest implements UpdateRequestInterface
         }
 
         // parse response a bit. No message yet.
-        $response          = $json['firefly_iii'][$channel];
+        $response = $json['firefly_iii'][$channel];
+        $date     = Carbon::createFromFormat('Y-m-d', $response['date']);
+        if (false === $date) {
+            $date = today(config('app.timezone'));
+        }
         $return['version'] = $response['version'];
         $return['level']   = 'success';
-        $return['date']    = Carbon::createFromFormat('Y-m-d', $response['date'])->startOfDay();
+        $return['date']    = $date->startOfDay();
+
         app('log')->info('Response from update server', $response);
 
         return $return;
diff --git a/app/Services/Internal/Destroy/AccountDestroyService.php b/app/Services/Internal/Destroy/AccountDestroyService.php
index c736265d01..dc8be9c16e 100644
--- a/app/Services/Internal/Destroy/AccountDestroyService.php
+++ b/app/Services/Internal/Destroy/AccountDestroyService.php
@@ -118,7 +118,7 @@ class AccountDestroyService
 
         $collection = Transaction::groupBy('transaction_journal_id', 'account_id')
                                  ->where('account_id', $moveTo->id)
-                                 ->get(['transaction_journal_id', 'account_id', DB::raw('count(*) as the_count')]);
+                                 ->get(['transaction_journal_id', 'account_id', DB::raw('count(*) as the_count')]); // @phpstan-ignore-line
         if (0 === $collection->count()) {
             return;
         }
diff --git a/app/Services/Internal/Support/AccountServiceTrait.php b/app/Services/Internal/Support/AccountServiceTrait.php
index eeed7d1db6..2ce9a4583b 100644
--- a/app/Services/Internal/Support/AccountServiceTrait.php
+++ b/app/Services/Internal/Support/AccountServiceTrait.php
@@ -224,7 +224,11 @@ trait AccountServiceTrait
     protected function createOBGroup(Account $account, array $data): TransactionGroup
     {
         app('log')->debug('Now going to create an OB group.');
-        $language   = app('preferences')->getForUser($account->user, 'language', 'en_US')->data;
+        $language = app('preferences')->getForUser($account->user, 'language', 'en_US')->data;
+        if (is_array($language)) {
+            $language = 'en_US';
+        }
+        $language   = (string)$language;
         $sourceId   = null;
         $sourceName = null;
         $destId     = null;
@@ -478,6 +482,10 @@ trait AccountServiceTrait
         }
 
         $language = app('preferences')->getForUser($account->user, 'language', 'en_US')->data;
+        if (is_array($language)) {
+            $language = 'en_US';
+        }
+        $language = (string)$language;
 
         // set source and/or destination based on whether the amount is positive or negative.
         // first, assume the amount is positive and go from there:
@@ -686,6 +694,10 @@ trait AccountServiceTrait
     {
         app('log')->debug('Now going to create an OB group.');
         $language   = app('preferences')->getForUser($account->user, 'language', 'en_US')->data;
+        if (is_array($language)) {
+            $language = 'en_US';
+        }
+        $language= (string)$language;
         $sourceId   = null;
         $sourceName = null;
         $destId     = null;
diff --git a/app/Services/Internal/Update/AccountUpdateService.php b/app/Services/Internal/Update/AccountUpdateService.php
index 7cd393f2d2..3f1be9e18e 100644
--- a/app/Services/Internal/Update/AccountUpdateService.php
+++ b/app/Services/Internal/Update/AccountUpdateService.php
@@ -338,6 +338,9 @@ class AccountUpdateService
             return;
         }
         $array = $preference->data;
+        if(!is_array($array)) {
+            $array = [$array];
+        }
         app('log')->debug('Old array is: ', $array);
         app('log')->debug(sprintf('Must remove : %d', $account->id));
         $removeAccountId = $account->id;
diff --git a/app/Support/Amount.php b/app/Support/Amount.php
index 6d08315871..bce86beb31 100644
--- a/app/Support/Amount.php
+++ b/app/Support/Amount.php
@@ -77,7 +77,7 @@ class Amount
         $fmt->setSymbol(NumberFormatter::CURRENCY_SYMBOL, $symbol);
         $fmt->setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, $decimalPlaces);
         $fmt->setAttribute(NumberFormatter::MAX_FRACTION_DIGITS, $decimalPlaces);
-        $result = $fmt->format((float)$rounded); // intentional float
+        $result = (string) $fmt->format((float)$rounded); // intentional float
 
         if (true === $coloured) {
             if (1 === bccomp($rounded, '0')) {
diff --git a/app/Support/Http/Controllers/RequestInformation.php b/app/Support/Http/Controllers/RequestInformation.php
index 0e5941775f..faef448fbc 100644
--- a/app/Support/Http/Controllers/RequestInformation.php
+++ b/app/Support/Http/Controllers/RequestInformation.php
@@ -55,7 +55,7 @@ trait RequestInformation
         $url   = url()->to('/');
         $parts = parse_url($url);
 
-        return $parts['host'];
+        return $parts['host'] ?? '';
     }
 
     /**
@@ -129,7 +129,9 @@ trait RequestInformation
      */
     final protected function getSpecificPageName(): string // get request info
     {
-        return null === RouteFacade::current()->parameter('objectType') ? '' : '_' . RouteFacade::current()->parameter('objectType');
+        /** @var string|null $param */
+        $param = RouteFacade::current()->parameter('objectType');
+        return null === $param ? '' : sprintf('_%s', $param);
     }
 
     /**
@@ -170,20 +172,25 @@ trait RequestInformation
         $attributes['location'] = $attributes['location'] ?? '';
         $attributes['accounts'] = AccountList::routeBinder($attributes['accounts'] ?? '', new Route('get', '', []));
         try {
-            $attributes['startDate'] = Carbon::createFromFormat('Ymd', $attributes['startDate'])->startOfDay();
+            $date = Carbon::createFromFormat('Ymd', $attributes['startDate']);
         } catch (InvalidArgumentException $e) {
             app('log')->debug(sprintf('Not important error message: %s', $e->getMessage()));
-            $date                    = today(config('app.timezone'))->startOfMonth();
-            $attributes['startDate'] = $date;
+            $date = today(config('app.timezone'));
+
         }
+        $date->startOfMonth();
+        $attributes['startDate'] = $date;
+        unset($date);
 
         try {
-            $attributes['endDate'] = Carbon::createFromFormat('Ymd', $attributes['endDate'])->endOfDay();
+            $date2 = Carbon::createFromFormat('Ymd', $attributes['endDate']);
         } catch (InvalidArgumentException $e) {
             app('log')->debug(sprintf('Not important error message: %s', $e->getMessage()));
-            $date                  = today(config('app.timezone'))->startOfMonth();
-            $attributes['endDate'] = $date;
+            $date2 = today(config('app.timezone'));
         }
+        $date2->endOfDay();
+        $attributes['endDate'] = $date2;
+
 
         return $attributes;
     }