I have installed from scratch PHPLis 3.3.1. Previously I installed phplist many times with old versions. I already checked that I have PHP5.6.30. I have the basic config.php file.
Access to the phplist desktop without problem. But when I click on any link in the menu, phplist logs me out. That is, it ends my session, and returns me to the login page.
I tried it on Mozilla, Crhome, and Avastt Safe Zone Browser, and nothing. I rebooted the server and always had the same problem.