WHMCS stucks at payment after checkout with 524 error Help Needed! Urgent!

[jetchirag]

Hi,

When someone trys to pay for invoice it keeps loading.

When someone buy a product is keep loading and shows 524 error.

 

Possibly, recent try to install whmcs-affiliatecoupon plugin

or maybe LARA theme.

Already uninstalled.

 

Please help!

[brian!]

if I recall, 524 error is usually a cloudflare issue...

[jetchirag]

Yes, it is. When Someone places an order it keeps loading. I am still stuck.

 

It was working before.

 

- - - Updated - - -

 

Ohk, I disable cloudflare and this is what I am getting

 

ERR_SPDY_PROTOCOL_ERROR