i have been trying to create a sorcerer subclass for two weeks now... But I always run into the problem of "This homebrew Subclass has data mapped to it that is licensed content or private homebrew. This typically occurs when licensed or private homebrew spells are linked to the Subclass"... I have made the subclass now multiple times... and deduced that some of the Core Rules Spells are now considered "licensed content"... and can't be used :D. At least the spell Fear... and some others always make it impossible to share my subclass. And for the record, I have deduced this by making one change, saving, then checking for the "data mapped to licensed" text. Can you fix this!

mind spike and feign death also not allowed

You don't need to publish your homebrew to use it in your games, and really shouldn't unless it's fully tested and proofed, and you can use anything in private homebrew.

But yes, some spells in the PHB are not in the free rules, and can't be used if they're not paid for, and so cannot be in public homebrew.