fix(xo-server/jobs): don't throw when the job owner doesn't exist (#5405)

Introduced by 31b19725b7

CHANGELOG.unreleased.md

@@ -27,3 +27,5 @@
 > - major: if the change breaks compatibility
 >
 > In case of conflict, the highest (lowest in previous list) `$version` wins.
+
+- xo-server patch

packages/xo-server/src/xo-mixins/jobs/index.js

@@ -263,7 +263,11 @@ export default class Jobs {
     })
 
     const app = this._app
-    const user = await app.getUser(job.userId)
+    const user = await app.getUser(job.userId).catch(error => {
+      if (!noSuchObject.is(error)) {
+        throw error
+      }
+    })
     const data = {
       callId: Math.random().toString(36).slice(2),
       method: 'backupNg.runJob',