Working through a few issues. The biggest issue now we have an older code base that worked on the previous server (ISPconfig 3.2.2 centos). After the migration it won't work on the new server. It gives a 500 error. Nothing is in the sites error log, except for a sslstapling warning. I did try to change the PHP version to 7.2, that has had no effect. I'd like to try to switch PHP to mod-php. I installed mod-php7.2 version but it's not an option in the php drop down. The code is a codegniter project called ospos (opensource point of sale). Is there a log file i'm over looking? I've check the php-fpm7.2 log, it doesn't report any errors nor does the sites apache error.log. Fresh install on Ubuntu 22.04 LTS **update** I do have this error on almost every site: ssl_stapling_init_cert: can't retrieve issuer certificate!