Hello
In this week my site is a problem encounter connection and registration of new member, the problem just when I want to connect either admins or all members, in fact, when I connect with my admin login and password it says I thank you for your connection, administrator, "but then I rammene on the homepage in no way connected.
I also note that a blank page appear when we flew create new registration of members

I think the problem appears after a part of my work is to empty the file template_c
I made a verification of my browser with the tool browser_check the test is Ok

Please help me to solve this problem
Thank you in advance