Garry mod instance not downloading

OS Name/Version: windows 10

Product Name/Version: 2.8.0.8 - 20260927.1

Problem Description: Garry’s mod instance create, kicks out and error saying:
Failed to create instance
An AMP licence key must be specified in settings to create new instances. See Configuration > Instance Deployment > Deployment Defaults > Licence Key.

i have a AMP Advanced Edition license and ive been able to run and host numerous other game servers


Steps to reproduce:

  • Step 1: create new instance
  • Step 2: select garrys mod or garrys mod x64
  • Step 3: create instance

Actions taken to resolve so far: searched forms and generic instance options for creating the server