| Error pattern | Likely cause | First action |
|---|---|---|
| App cannot connect/load | Install/runtime issue | Re-run installer and relaunch |
| Provider unavailable | Auth/config problem | Re-auth in Harness Authentication |
| Session fails immediately | Provider/bootstrap/network setup | Run session checklist in Session Won’t Run |
| No diff available | Wrong context or no edits | Follow Diff Not Showing |
Troubleshooting
Common Error Messages
Quick lookup for recurring setup and runtime errors
Use this table as a starting triage map.
If the first action fails, collect exact error text and report with reproduction steps.