stefankraus

Thank you very much for the help.
Sometimes this solution to the problem is quite simple.
And sorry, for the incorrect placement of my question. I will pay attention to it in the future.
Have a nice day!

Thanks for your help.
That was my first thought too.
But (although I had super-cache installed) there is no wp-super-cache folder in the plugin folder.
There is a separate cache folder with an empty supercache subfolder.

Hi,
I also get this error message since the last WordPress update 5.3 and can no longer log in:

Warning: include_once (/www/htdocs/w00d04f7/blog/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No search file or directory in / www / htdocs / w00d04f7 / blog / wp-content / advanced-cache.php on line 8

Warning: include_once (): Failed opening ‘/www/htdocs/w00d04f7/blog/wp-content/plugins/wp-super-cache/wp-cache-phase1.php’ for inclusion (include_path = ‘.: / Usr / share / php: .. ‘) in /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php on line 8

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-login. php on line 496

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-login. php on line 512

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / functions.php on line 5946

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / pluggable.php on line 932

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / pluggable.php on line 933

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / pluggable.php on line 934

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / pluggable.php on line 1265

Warning: Can not modify header information – headers already sent by (output started at /www/htdocs/w00d04f7/blog/wp-content/advanced-cache.php:8) in / www / htdocs / w00d04f7 / blog / wp-includes / pluggable.php on line 1268

How can I fix this?