Resolved - Server Error 500 Zend_Db_Adapter_Exception SQLSTATE[HY000] [2002] No such file or directory | Plesk Forum
Some of the selected domains or aliases were not activated.Unable to activate the domain: Either the domain owner or their subscription is suspended. | Blog - 24x7serversupport
[Solution] Plesk Server 500 Internal Error - Official solution from Plesk Support. (FREE) - YouTube
Solution] Plesk suddenly crashed with 500 Internal Server Error - YouTube
Some Plesk operation failed: no secure shell available – Plesk Help Center
Plesk Plesk 8.4 Unix Administrators Guide | PDF | Email | Domain Name System
Parallels Plesk Panel 9.5 Quick Start Guide
Issue - 500 Plesk\Exception\Database | Plesk Forum
How to Fix a 500 Internal Server Error (11 Steps That Work)