Error 500 After Payment Prestashop 1.6

[j.corbani_15622]

Hello, i have a problem after payment whith module multipleseller : Error 500 After Payment Prestashop 1.6.
The order doesn't appear on back office.
Can you help me? Thank you

[shokinro]

the module was purchased more than a year and half ago, so it was working fine before.
it must be caused by something changed in your store. what change have you made to your store?

You can try to set your sore in DEV/Debug mode and try again to see what is the detailed message, so that we can give you advises.