😂Gott dangit! I think I have finally figured out what the damned issue was.
I think it's related to the Tags.
Best I can ascertain at the moment is that the [Primary Tags] nested [Secondary Tags] -aren't actually considered secondary tags at all but rather [Sub-Primary Tags] or something.
And there's an entirely separate section specifically regarded as [Secondary Tags] -buttwich... or ahhh, I mean, but which can't be set in any hierarchy nor nested in.
So basically I was trying to set it with members required to select ×1 [Primary Tag #1] along with ×1 [Sub-Primary Tag #1], except I seem to have mistakenly assumed the nested [Sub-Primary Tags] were simply [Secondary Tags], ie:
•Primary Tags Required = [1] to [1]
•Secondary Tags Required = [1] to [1]
[Primary Tag #1]------------------(Members)
->[Sub-Primary Tag #1(a)]
->[Sub-Primary Tag #1(b)]
->[Sub-Primary Tag #1(c)]
->[Sub-Primary Tag #1(d)]
[Primary Tag #2] ---------------(Admin only)
->[Sub-Primary Tag #2(a)]
->[Sub-Primary Tag #2(b)]
->[Sub-Primary Tag #2(c)]
Yet the [Secondary Tags] section is below that and in my case doesn't even have any secondary tags yet, thus is likely therefore why members weren't able to create new discussions...because no secondaries existed.
Additionally for others future reference, there currently is no clarification about this provided within the Tags extension to highlight & explain such an unusual manner of categorization.
The fact is that I only realized all this after eventually stumbling into a thread here while thinking I was looking for a completely different answer.
Don't get me wrong though. This isn't complaining. This is frank and constructive feedback.
If the intention is to entice & attract customers to Flarum by freely providing the basic Flarum system along with a number of non-premium free extensions, then these free extensions should be of a reasonable standard which doesn't unintentionally lead to significant confusion & frustration simply by lacking basic clear explanations & instructions, such as: Nested [Sub-Primary Tags] are not [Secondary Tags]. 👈 Adding just this one sentence alone is pretty much all that needs to be done with the Tags extension in order to rectify this minor niggling oversight, an oversight that otherwise has the potential for creating massive headaches. I mean...😂bloody'ell, I just spent two days tearing my forum apart because of this.