Full Permission required on elfinder

Your software
My PHP version is : 7.2
*My MariaDB: 10.2

Your problem
My problem is :

When trying to access the file manager from a blank email template in the popup I get this error on elfinder
Full authentication is required to access this resource.

Steps I have tried to fix the problem :

@mikew

What version of Mautic are you running?

This sounds like a problem with your installation.

Sorry should have put that in: Mautic 3.1