500 - Internal Server Error plesk

If you have problem when you access plesk via https://ip:8443 you try to restart service of plesk:

/etc/init.d/sw-cp-server restart

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Fixed: Call-time pass-by-reference error and possible solution

-If your code return this error: Call-time pass-by-reference error and possible solution :

edit php.ini search this line: allow_call_time_pass_reference equal On (usually you will see equal off) .
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File content mysql root and password of ISPconfig

/home/admispconfig/ispconfig/lib/config.inc.php

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