Hi,
I can confirm that the clamAV problem is gone with latest zentyal 6.2.x and latest clamAV 0.102.x.
Moreover, I solved the problem of apache with fast-cgi by enabling http2: a2enmod http2. So now it works well as with zentyal 6.0.x.
Unfortunately, I have not solved the other problem with apache handler yet, but it seems something related to ubuntu server 18.04.
Hi,
I just upgraded to php-7.4 and the problem is solved even with apache handler. So the culprit was php-7.2.