Still love GP after several years (at least two) Using it on 5 sites.
Recently upgraded Envira Gallery (good reputation) to the pro version which adds a lot of individual add-on plugins. I am a gallery laden website.
With Envira activated, I cannot get to the organizer. I can see the url trying but the page stays blank.
Troubleshooting:
The GP organizer can be reached if I deactivate the entire Envira Gallery (have not tried add-on by add-on)
Have tried deactivating one or the other with different themes and still the same issue.
With GP Prem diactivated customizer works with any theme. I think that puts the ball in your court, but not sure. Keep up your grand support.
Wondering if anyone else has reported this issue. If you wish login, email me.
Thanks, Genie