By staging site I mean a publicly available copy of your production site that I can access and modify to troubleshoot.
Any idea why this would solve the problem?
No idea without looking at your modifications.
Once you have the staging site set up I’ll be able to look at your whole code and mods, and then we can schedule a zoom session to troubleshoot in real time. I know you’re in a very different timezone, but the way you’ve set things up with your customizations seem to be conflicting with the plugin somehow.