Not able to Add to Review after app got removed from sale

My app got removed from sale due to some screenshots that wasn't in compliance with the guidelines.

After it got removed an error has occurred, where I'm not able to add a new version to review. An I get an unexpected error. See screenshot below.

Has been stuck on this for more than a week now. And neither the Developer Support or the App Review Team has been able to resolve the issue yet. I have talked to both by phone several times. Developer support has said it it up to the Review team to resolve. But the Review team has not found a solution yet.

I suspect it might have to do with the Availability of the app. Ever since it got removed from sale every country has the status "Cannot Sell App". And I'm not able to make it available for any country. See screenshot below.

But I can't be sure. Anyone else has experienced this issue and has been able to get it resolved? It's a bit urgent because the app is currently not on the App Store and this is my main app and main source of income.