Ramom School Subscription (SaaS) v3.0

am having Ramon 3.0 but its manufunction so I will give it to any body that can help me fix the issue
 
I have installed the Ramom School v6.2 but after installation, i'm getting 504 error when i try to login as super admin. Can anyone help me ?
 
as i have said am having ramom 3.0 but when ever i install it, all the function will be giving successful message but will not work and later it will return to 500 sever error
 
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