Same issue even with all you modules turned off. I have a subscription with MainWP, not the free version. I have a whole bunch of their plugins turned on but have no interest in troubleshooting them all versus yours, too time-consuming when I can just turn gp-premium off.. It’s a site I use for maintenance only so I could do without GP on it if need be. But I’m sure if your understand what’s up it’ll give you hints for other little potential conflicts in other situations.
Thanks.