Internal server error new install

I install Nextcloud 12.0.3
And after the installation, it runs correctly
I make a first sync
And ther error
Internal Server Error

The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log.

with no more information

Thanks for yout help

That is the same message I receive but it is in german. Is there a bug?

Without logs, folks, there’s no saying what’s wrong.

Please output the apache error log at least.