Hi all,
I have one simple extension, and when I try to install it via Visual Studio, works everything fine, but when I try to install the extension as PTE in the TEST-Sandbox I'm getting the following error message:
Deployment failed. Errors: App ID Message : { The app (or one of its dependencies) is not available for your release (check the country and version availability in the extension marketplace).
I don't know where the problem lies

Any advices

Thanks
Answers
I am facing the same issue. We copied a new sandbox from production and have been able to install the app there. So I guess, the app is fine. Don't know of any sandbox configuration prohibiting the installation.
I'll keep you posted.
Same problem here. Any updates?
I have resolved my problem with increasing the minor part of the version id.