Core Keeper writes its current runtime output to saved/corekeeper.log, and TCAdmin also exposes the latest output through Log Viewer.
- Reproduce the problem once and note the time.
- Open Log Viewer from the service page.
- Start at the latest server launch and find the first error, not only the final repeated line.
For connection problems, confirm the server reached Running and produced GameID.txt. For world problems, check the selected world slot and whether the JSON remains valid. For version mismatches, run Steam Update and update the game client.
Include the relevant log section, the time of the failure and the last setting changed when submitting a support ticket.
