Issue with billing in test-stores

After some inactive testing time (some weeks) I get now this message after choosing a subscription in my test store:
This feature isn’t currently available for your store. What has changed???

Before it did work well!

I believe this is an issue with the new ‘Plus dev’ stores (Dev dashboard admin areas are broken). If you take a quick look at that thread, does it sound like the issue you’re running into, or are you experiencing something different?

Hello,
Yes, that was this plus issue. So I changed it into standaard and problem was solved…

This bug is still live. I am having the same issue.

cc: @Liam-Shopify