Update Failure with Application Deployment - Instance creation fails with access denied

System Information

Field Value
Operating System Windows - Windows 11 Pro on x86_64
Product AMPService ‘Phobos’ v2.6.5.2 (Mainline)
Virtualization None
Application Application Deployment
Module ADSModule
Running in Container No
Current State Indeterminate

Problem Description

Issue

When attempting to create a new Minecraft instance, AMP fails with:

“Unable to complete task - Create instance - Minecraft - State: 3”

Error details:
Create Instance Failed: The core archive failed to download or unpack.
UnauthorizedAccessException: Access to the path ‘D:\AMPDatastore\Instances...’ is denied.

AMP is running as Administrator.
Folder permissions are set to Full Control.
Tried reinstalling AMP in a clean directory.
Tried different drives and paths.
The issue persists.

Please advise.

Reproduction Steps

  • Installed AMP on Windows 11.
  • Started AMP as Administrator.
  • Attempted to create a new Minecraft instance.
  • Instance creation fails with “State: 3” and UnauthorizedAccessException.

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