Good day RSkou,
Technically, it shouldn’t be an issue to create new forms, as the limit is 10k form (it will be branded forms, though, for the free versions). I have taken this info from here: HubSpot’s Product & Services Catalogue / Limits.
Troubleshooting:
1) have you tried clearing your cache.
2) have you tried a different browser?
3) if not working, can you share a Loom video where you try to add a form?
Best,
Martijn
