Our Sharepoint 2013 Application failed to install and is stuck in a odd state. I followed the recommended approach for deleting the application using powershell commands on the hosted Sharepoint server, but it doesn't execute properly.
Visual Studio Deployment/Retract Reports:
Skipping the uninstall step because the app for SharePoint is in an invalid state and cannot be uninstalled.
PowerShell Commands
$instances = Get-SPAppInstance -Web http://mysite/sites/collection
$instance = $instances | where {$_.Title -eq 'Application.Title'}
Uninstall-SPAppInstance -Identity $instance
Executing this PS command throws...
The System Account cannot perform this action.
There is no option from the Sharepoint UI to remove the application, and retrying the install also fails. I've tried other user accounts to execute this powershell command (other than the system account), but no dice. I will have to delete the developer site collection if there is no other solution.