CODEWITHSUNDEEP
typo3typo3-9.x
Joey Bouten
Joey Bouten

Reputation: 155

Uncaught TYPO3 Exception: Cannot use object of type __PHP_Incomplete_Class as array

Core: Exception handler (WEB): Uncaught TYPO3 Exception: Cannot use object of type __PHP_Incomplete_Class as array | Error thrown in file typo3/sysext/backend/Classes/Controller/Page/TreeController.php in line 189

This happened after a core update to TYPO3 - 9.5.17

Upvotes: 2

Views: 1386

Answers (2)

Stefan Busemann
Stefan Busemann

Reputation: 16

You can also use the Module "Maintenance" in "Admin Tools". There you find the card "Reset Backend User Preferences".

This solves also the problem.

Be careful: All be_users settings are getting resetted to default!

Upvotes: 0

Joey Bouten
Joey Bouten

Reputation: 155

https://forge.typo3.org/issues/91407

The following thanks to Michael Hitzler.

As far as I can see there is already a solution within the install tool in class BackendUserConfigurationUpdate. This seems to address exactly the issue.

Not quite sure in which version the additional migration task has been added, but it helps you solving the issue system wide.

Just got to module Admin Tools -> Update and select Update Wizard. There you should see a new, not yet executed migragtion task: Update backend user configuration array The backend user "uc" array, which is persisted in the db, now only allows for arrays inside its structure instead of stdClass objects. Update the uc structure for all backend users.

Execute this migration task and your BE users will be updated and have a sane uc configuration in the end.

Problem solved and page tree can be loaeded again.

./typo3cms upgrade:wizard backendUsersConfiguration

Should solve the issue.

Upvotes: 3

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