I have a similar problem in that I also need a feature enabled for my dev-tenant. We used to be able to register support cases but I also get the permission denied and the old email is not used anymore... I hope it is a bug because it worked before they remade their login to this place.

Sorry for not being any help, just responding so Okta can see that it is a big problem and not just you. 🙂

Sorry for more bad news. I found this response to another thread where Okta claims that support cases are not available for dev accounts. It severely limits the use case of dev accounts since they have so many features that supports needs to enable etc.

https://support.okta.com/help/s/question/0D54z0000A3rvA6CQI/how-to-create-support-case-on-preview-tenants?language=en_US

hey @User16878748391795927222 (Customer)​ thanks so much for your responses-- I totally missed that post you just linked and it's a bummer to hear. It makes sense from a business perspective why Okta would change that model but sucks for us. I'll probably just open up an internal ticket with our IT team that owns the corp Okta so they can open up a support case on my test tenant's behalf for adding these features. I'm just so used to all these features being enabled for the okta preview tenant I had for many many years. Cheers!