I think it has something to do with the current incident Azure is having with ARM template deployment - https://status.azure.com/en-us/status
"Starting at 08:45 UTC on 04 Jun 2020, some customers may experience issues with resource creation for services that depend on the Azure Resource Manager (ARM) platform. We are aware of this issue and are actively investigating. The next update will be provided in 60 minutes, or as events warrant.
This message was last updated at 11:37 UTC on 04 June 2020"