Unable to access wp-admin

Hello,

After installing and successfully testing the plug-in, I logged-out and when I wanted to connect to my dashboard, I can’t access anything. There’s a loop going on and an error showing.

What can I do to get the website back ? I tried changing the name of the folder of plugin in order to deactivate it but it didn’t work. Wanted to make my website safer, now, I can’t even access

Thank you

The page I need help with: [log in to see the link]