Apparently, this is an ongoing issue. Pls refer to https://learn.microsoft.com/en-us/answers/questions/1527674/the-subscription-is-not-allowed-to-create-or-updat and https://stackoverflow.com/questions/78101504/azure-app-service-deployment-failing-the-subscription-xxxx-xxxx-xxxx-is-not-al for more info - but you'll likely need to keep trying
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hth
Marcin