The Plesk panel cannot be opened:
PLESK_ERROR: 500 Internal server error
The same behavior is observed while trying to access any .php file inside
The one-time login link command fails with:
C:\> C:\Users\Administrator>plesk login
The system cannot find the file specified. (Error code 2) at Unable to start ("C:\Program Files (x86)\Plesk\admin\engine\php.exe" -q "C:\Program Files (x86)\Plesk\admin\plib\cu\admin.php" --get-login-link -user admin)
at (RunTime::Execute::start line 704)
at Unable to execute CU(wmain line 64)exit status 1
%plesk_dir%\admin\engine\php-cgi.exe is missing.
- Restore the missing file from other working Plesk server running the same version, e.g. 18.0.53.
Note: In case there is an Antivirus, the file might be restored from the quarantine and
%plesk_dir% should be added to exceptions.