When attempting to start Octopus Manager (version 2020.1.12.0) I get the following error:
Description: A .NET Core application failed. Application: Octopus.Manager.Server.exe Path: C:\Program Files\Octopus Deploy\Octopus\Octopus.Manager.Server.exe Message: The application to execute does not exist: 'C:\Users\<username>\AppData\Local\Temp\.net\Octopus.Manager.Server\j43ftxkj.mmw\Octopus.Manager.Server.dll'.
I’ve checked and the assembly is in this location. I’ve tried clearing out the temporary folder and allowing it to be rebuilt following a restart of the machine.
I did a repair of the installation by running the installer again and restarted the server with the same issue.
It may relate to https://github.com/dotnet/runtime/issues/3778 where temp files are cleared up.
Only after several clean-ups of the temp directory and restarts was I finally able to get Octopus Manager to launch successfully.