Acronis Cyber Protect Cloud: Cannot save plan with enabled Cyber Protection features

You create or edit a protection plan for a Windows machine and enable Cyber Protection features (such as Active Protection, Vulnerability Assessment sections etc.). The plan cannot be saved after making these changes. You don't see any error in the web interface.

If you check HAR logs, you can see 404 error for requests like 
PUT https://us5-cloud.acronis.com/api/policy_management/v2/drafts/8d6ab34b-a...