WHMCS 7.4.2 + ipscfg3 - Error 500 PHP 7.0

[dawidryba]

Welcome.
First... sory for my bad English.
I have problem with WHMCS 7.4.2 installed on Directadmin with PHP 7.0 FPM.
I uploaded ispcfg3-master to modules/servers and rename folder ispcfg3.
When i want to go add server on address configservers.php?action=manage i got error 500.
If i delete ispcfg3 from modules/servers then error 500 gone.

I tried find logs in httpd error_log and vhost domain error_log but this anomaly isn't save in this files.

Thanks you for reply.