How to fix this location is not available for subscription?
Maybe you can reference this blog: Azure / SQL Server / This location is not available for subscription. It has the same error with you. Run this powershell command to check if the location you choose is available: If the location is available, the best way to resolve this issue just contact the Azure support to have this enabled for you.
What does 'no subscriptions were found' mean?
Private cloud means Azure Stack. The message of 'No subscriptions were found' means the account went through the authentication doesn't have accesses to any subscriptions. Sorry, something went wrong.
What does location is not available mean?
The correct error message is displayed in the “Location is not available” wizard which reads “The disk structure is corrupted and unreadable.” This means that the hard disk drive cannot be accessed because the Master File Table (MFT) is corrupted and the disk structure cannot be read.
How do I check if a location is available?
Run this powershell command to check if the location you choose is available: If the location is available, the best way to resolve this issue just contact the Azure support to have this enabled for you. You can do this for free using support page on your Azure Portal.