After Update cannot delete a Instance and all gameservers are deleted

Thanks this resolved the issue. I summarize the steps I dont to fix the issue:

  • Run ampinstmgr stopall so top all instances
  • Go to C:\AMPDatastore and copy the instances.json to your desktop (just in case this won´t work)
  • Rename the latest *.bak file to instances.json
  • execute the command ampinstmgr --nocache upgradeall and
    sc start amp-ads01

Additional troubleshooting, because windows cannot find the service amp-ads01

  • Start the InstanceManager as administrator
  • Right-click the AMP-ADS01 service and hit uninstall service if available or hit install service
  • Start the service and all Instances are there
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