I upgraded from ubuntu 21.04 to 21.10.
apache2 does not change to php8 even after a2dismod php7.4 (...).I get the following error.I checked the config files in apache/ but could not find a line for it.
[Fri Jan 07 13:04:04.231832 2022] [proxy:error] [pid 1320] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /run/php/php7.4-fpm.sock (*) failed[Fri Jan 07 13:04:04.231889 2022] [proxy_fcgi:error] [pid 1320] [client 127.0.0.1:50726] AH01079: failed to make connection to backend: httpd-UDS, referer: http://localhost/oodb...[Fri Jan 07 13:04:04.780393 2022] [proxy:error] [pid 1319] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /run/php/php7.4-fpm.sock (*) failed[Fri Jan 07 13:04:04.780431 2022] [proxy_fcgi:error] [pid 1319] [client 127.0.0.1:50728] AH01079: failed to make connection to backend: httpd-UDS, referer: http://localhost/...[Fri Jan 07 13:04:06.829607 2022] [proxy:error] [pid 1318] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /run/php/php7.4-fpm.sock (*) failed