Hello at all PragmaMx community

i need your help today because
when a user want to register,
it can't be redirect by the website.
When i try to update the website :
I got the same thing.
Microsoft edge said :
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Erreur HTTP 500
Étrange... Le site web ne parvient pas à afficher cette page
Il se peut que le site soit en cours de maintenance ou qu’une erreur de programmation se soit produite.
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running on 1.12.3
I try to change files by original ones and other working same folder
on other domain. So i don't know where the problem come from.
i try to re upload User_Registration and Your_Account modules.
but same results. i don't have this error before, and i working in subfolder installation.
I think to an htacces problem after look on the web but if remove the .htacces it change nothing.
the problem stay. you can try yourself here
http://www.tradezone.fr/modules.php?name=User_Registration Can you help me ?
Thanks for your support.
Best regards. shorty