63831: Acronis Cyber Protect Cloud: editing backup plan fails with "InternalServiceError", "No resources found"

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Symptoms

You had a files/folders backup plan which was applied to several machines. You have deleted Acronis Agent on one of the machines (for example, the machine was replaced or decommissioned).

After update to Acronis Cyber Cloud 8.0, cannot be edited. You see this error message:
 

Error code: 500
Module: 707
LineInfo: 0x359FD5F97C1285D8
Fields: {"$module":"ams_core_protection_addon_lxa64_XXXXXX"}
Message: Unexpected response received. Method: 2, Url: /compat/plans?imported=false, Status: 500. Body: {"code":"InternalServiceError","context":{"stackTrace":"[XXXXXXX]"},"debug":{"msg":"No resources found"},"domain":"BackupManager","reason":"InternalServiceError"}

Backups still compele successfully.

Cause

Issue in the product.

Solution

The issue has been fixed in version 9.0.