مشکل درگاه پرداخت زرین پال

[rahmat3080]

سلام
دوستان ، اگه ممکنه راهنمایی کنین

خطایی که هنگام زدن دکمه پرداخت می دهد:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@topcard.top to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

اینم لاگ :

Fri Aug 19 20:57:05.818068 2016] [:error] [pid 24933] [client 5.202.37.195:43402] File does not exist: /home/topcardt/public_html/index.php, referer: http://topcard.top/sina/index.php?page=c...h&itemId=4
[Fri Aug 19 20:57:05.817887 2016] [:error] [pid 24933] [client 5.202.37.195:43402] SoftException in Application.cpp:610: Directory "/home/topcardt/public_html/sina/oc-content/plugins/payment" is writeable by group, referer: http://topcard.top/sina/index.php?page=c...h&itemId=4
[Fri Aug 19 20:14:34.057837 2016] [:error] [pid 13961] [client 5.202.37.195:56618] File does not exist: /home/topcardt/public_html/index.php, referer: http://topcard.top/sina/index.php?page=c...h&itemId=4
[Fri Aug 19 20:14:34.057566 2016] [:error] [pid 13961] [client 5.202.37.195:56618] SoftException in Application.cpp:610: Directory "/home/topcardt/public_html/sina/oc-content/plugins" is writeable by group, referer: http://topcard.top/sina/index.php?page=c...h&itemId=4

مشکل کجاست؟