Hi friends! I recently changed the Apache mode on my Centos 7.3 VPS to use MPM_WORKER. I went from 4 restarts per day with MPM_PREFORK to an absolutely stable system with MPM_WORKER. My problem now is that when I create new domains with a Let’s Encrypt Certificate, it fails and gives me the following message:
Changing IP address of virtual website …
… done
Adding new SSL virtual website …
… certificate file is not valid : Line 31 does not look like PEM format
Saving server details …
… done
Applying web server configuration …
… done
Nothing gets changed, or installed. And there is nothing in the Apache system log indicating the problem. Please help me get to the bottom of this problem. Thanks!!