Webinterface shows nothing - core.js Uncaught SyntaxError: Unexpected end of input

After my raspberry lost power the webinterface shows nothing.
I allready downloaded nextcloud again, put my config in and run occ upgrade.
Windows and Android Clients work fine and allready shared folders are also displayed correctly.

Nextcloud version: 12.0.4
Operating system and version: Linux bananapi 3.10.65-BPI-M2U-Kernel #5 SMP Tue Nov 29 03:11:02 UTC 2016 armv7l GNU/Linux
Apache or nginx version:Server version: Apache/2.4.25 (Raspbian) Server built: 2017-01-25T22:59:26
PHP version: PHP 7.0.15-1 (cli) (built: Jan 25 2017 10:17:41) ( NTS )

The issue you are facing: Webinterface not showing anything. Everything else of the webinterface (settings, users, etc) works fine.

Is this the first time you’ve seen this error? (Y/N): Yes

Best regards, Julix

same issue here, have you found any solution?

Nope. Had to reinstall Nextcloud, create every user again and reupload all files.