1) Replace Flask-BabelEx with Flask-Babel. Fixes #6088

2) Upgrade Flask to version 2. Fixes #7010

web/pgadmin/misc/__init__.py

@@ -11,7 +11,7 @@
 
 import pgadmin.utils.driver as driver
 from flask import url_for, render_template, Response, request
-from flask_babelex import gettext
+from flask_babel import gettext
 from pgadmin.utils import PgAdminModule, replace_binary_path
 from pgadmin.utils.csrf import pgCSRFProtect
 from pgadmin.utils.session import cleanup_session_files

web/pgadmin/misc/bgprocess/processes.py

@@ -29,7 +29,7 @@ from pgadmin.utils.constants import KERBEROS
 import pytz
 from dateutil import parser
 from flask import current_app, session
-from flask_babelex import gettext as _
+from flask_babel import gettext as _
 from flask_security import current_user
 
 import config

web/pgadmin/misc/file_manager/__init__.py

@@ -24,7 +24,7 @@ from werkzeug.exceptions import InternalServerError
 import simplejson as json
 from flask import render_template, Response, session, request as req, \
     url_for, current_app, send_from_directory
-from flask_babelex import gettext
+from flask_babel import gettext
 from flask_security import login_required
 from pgadmin.utils import PgAdminModule
 from pgadmin.utils import get_storage_directory