impossible to delete a language

[PerePlex]

Hi everybody.

I try to delete a language but I can't.

The server answer :

impossible to extract

http://www.mywebsite.com/my-admin/index.php?controller=adminlanguages&id_lang=4&deletelang&token=fb6041abcd6bb702c5e15c39eed8084e

 

 

I try to sign in and out again but nothing.

I deleted one language without problem last week, but now...

 

 

Presta V1.5.2

profile : superadmin

navigator : chrome

 

On firefox : blank page

 

on explorer : err 404

Thank you for your help.