Hello,
I could not see your screenshot because it’s too big for upload. Can you downscale it, or maybe copy the text?
In any case, I already explained the situation to you: As far as I can tell, BuddyPoss seems to disallow all calls to the WP REST API except for a few ones that they need. Hence the problem with other plugins as well. It really seems like it’s something that they should fix, unless if I’m somehow mistaken, which is possible.
What you should do is tell them what I told you. They should be able to either fix the issue, or at least explain to you why it’s not their fault. You can open an issue at their github.
I don’t see how you can go around this as long as their plugin is enabled.