Hello ujjawal rana
Thank you for posting your question in the Microsoft Q&A Community.
I understand that you are not able to create an App Service and you got the error "The subscription is not allowed to create or update the serverfarm"
Take a look at this thread https://learn.microsoft.com/en-us/answers/questions/1657059/the-subscription-is-not-allowed-to-create-or-updat where this has been discussed. However, there is a few points to know:
- Retry to provision the App Service after a few hours.
- If your requirement fits, try deploying in a different region.
- Use the Free Tier to get started.
- If you continue to receive this error, please raise a support ticket for a closer investigation.
Babafemi