You have to look in the server logs to see this.

2023-06-15 13:35:04.899 [erro]  send CompletedJob  job_id=ad76c145-d07f-4403-812b-4d3ee0eca6dd ...
    error= insert resource: duplicate app slug, must be unique per template: "vnc"
           	storj.io/drpc/drpcwire.UnmarshalError:26
           	storj.io/drpc/drpcstream.(*Stream).HandlePacket:224
           	storj.io/drpc/drpcmanager.(*Manager).manageReader:247

Are there other validation errors that are not surfaced on cleaning up? Are we able to guarantee that this step doesn't hang moving forward?

Current behavior

The template push hangs and the user does not know that the problem is.

Expected behavior

Any server logs that cause provisioning to fail/hang should be exposed to the user in coder templates push or in the templates UI