The Issue from Permissions Error When Setting Tags seems not resolved. At least I have the same issue.
Querying current tags works fine, but settings tags with the tag command doesn’t.
The Response from the bot is “Twitch’s API returned an error: Not permitted”
I tried multiple variants and even with just single word tags like “!tags Techno”, but the result is the same.
I also tried logging out and in at nightbot.tv.
As per official Twitch docs, this should still be possible: Reference | Twitch Developers
I do not know how/if nightbot.tv updates it’s map of tag names and ids, but maybe Twitch changed the ids or their format and nightbot simply needs to sync these again? I suppose this might have broken when they introduced the additional tags earlier this year.