I did a complete backup on the old one then restored to 15.
Looking at the original 2.11 PBX, I see someone changed Asterisk Manager User to “amanager.”
Now on the newest FreePBX 15, I cannot even reach the advanced settings, so I went into manager.conf, manager_additonal.conf, and manager_custom.conf and see there is no [amanager] section.
I added [amanager] section in manager_custom.conf, but still I am getting the same issue in FreePBX, “can not connect to asterisk.”
Any more ideas?