Fatal error when logging into the site

[diegofrancesco]

Hello,
I'm reporting a bug in the GR module (v 1.1.4), which interferes with my Prestashop site and causes an error. The user accesses the site by entering the username and password but by clicking on login the word "fatal error" appears. Not error 500. There is no trace of alert or error in the log file.

I attach a screenshot of the error you see when you enable Prestashop debugging.

If I deactivate the module my site works normally, even for those users who have had the error.