An Azure service that is used to implement corporate governance and standards at scale for Azure resources.
Hi Seydi
This is a known issue with the versioning feature of the policy blade. The policy product group team is working on the fix.
To mitigate this,
Please use this URL which does not use the versioning, and you would be able to assign the policy without any errors: https://ms.portal.azure.com/?exp.versioning=false#home