Hi @Adriano Califano Can you share how you tried creating your azure app service resource? what app service plan do you have? The error message "The subscription <subscription_id> is not allowed to create or update the serverfarm" means there is a permission issue with your subscription.
Make sure that you have created an app service in the same region as your service plan. Also, you need to specify the service plan matched your app service
Also, make sure you have the necessary permissions to create App Service Plans within your subscription. This usually requires "Contributor" or "Owner" access. If you're part of a group or organization with Azure resources, check with your administrator to verify your permission level.
Lastly, if you're creating the App Service Plan within a specific resource group, try creating it in a different resource group where you might have more permissions. Alternatively, create a new resource group with the appropriate permissions and proceed with creating the App Service Plan there.
Please let us know if you have further questions.