https://wordpress.org/support/topic/how-to-debug-issues-after-updates?replies=1
Check server error logs to see the real error. The gateway you’re using may just be sending you to the wrong place.
My Provider does not provide me with any error logs, except this one:
AH00112: Warning: DocumentRoot [/usr/www/users/myname/de] does not exist
But the DocumentRoot should be /public_html
And wordpress is in /public_html/wordpress
I asked the provider for help and they replied that there is no other error on server side except that my DocumentRoot is not where wordpress is located.
But this is the correct behavior!
So wordpress has its own directory, as it is described in the official documentation:
https://codex.wordpress.org/Giving_WordPress_Its_Own_Directory
Is it possible that woocommerce can’t handle it when Site address (URL) is not equal to WordPress address (URL) (in Settings->General)?
whatever, I changed the documentroot so that wordpress is not installed in a subdirectory. Site address and WordPress address are the same now.
The error is replaced by another one now.
“Internal Server Error” has to be logged somewhere, You can try enable WP_DEBUG mode. https://wordpress.org/support/topic/how-to-debug-issues-after-updates?replies=1
What host is this? Hiding logs from users doesn’t sound great.
