I'm experiencing the same problem.
Obviously g2-integration does not know about the optional phpBB user group, which handles newly registered users who have not been approved by admins/moderators yet or reached the minimum post-count to be moved to the "registered users" group.
Unfortunately I'm no php-guy, would anyone know how to fix this?
Would it be enough to add NEWLY_REGISTERED to the array in line 260 of the g2helper.php like this?
Code: › $phpbbDefaultGroups = array(
'GUESTS',
'REGISTERED',
'REGISTERED_COPPA',
'GLOBAL_MODERATORS',
'ADMINISTRATORS',
'BOTS',
'NEWLY_REGISTERED'
);
Or is this also a synchronisation issue between g2 and phpBB?
edit: I gave it a try and it SEEMS to work. At least one is able to view the gallery without getting that error instantly.