First I installed language pack and then a custom style. Everything fine.
Then I installed 3 add-ons, everything was ok. Then another add-on and this error occured.
Could not solve the problem so I did a clean new installation of xenforo.
Did again same things and this time after second add-on installation this problem occured.
Then I did a database recovery where no add-ons are installed. Again same problem after added one add-on