WSABuilds Issue: A Specified Logon Session Does Not Exist Preface: This issue occurs when you are not installing WSA from an admin account. This is due to the limitations of installing unsigned MSIX on non-Admin accounts. Example: Solution: Make sure that the account that you are installing from is a Windows Administrator account. To check: 1. Open CMD 2. Type net localgroup administrators and press enter 3. Check if the account you are installing from, exists in the list of accounts in the "administrators" localgroup. 4. If it does not, then you are not installing from an admin account. Make sure that you run run.bat as Administrator. Make sure that you run Install.ps1 as Administrator.