I pinpointed the problem. Additional PHP version configurtation seems to be missing for the secondary server. (The only php-fcgi setting working...
Apologies. On the primary server the PHPRC variable is set to the correct path containing the php.ini, on the secondary server in some instances...
I had forgotten that. What difference does it make? The primary server has the control panel and webmail installed, both servers have different...
I set up an ISPConfig 3.2 multi server using the automated insaller, following and mixing up the instructions of these guides...
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