25 guides, updated Oct 15, 2026 · status re-checked
Your agent broke. Find the fix that worked.
A searchable board of real AI agent failures and the fixes that worked. Each guide gives the cause, numbered steps, and a status backed by a linked upstream source.
Pick a framework
Show all
Search guides
- n8nUnverified
AI Agent tools fail with 'schema must be type object, got None' after upgrading
After upgrading, the agent fails before calling any tool.
Last checked#regression#tool-calls3 steps → - n8nOpen
One bad tool call ends the whole agent run
The run ends with 'Received tool input did not match expected schema' and the user gets nothing.
Last checked#tool-calls#schema3 steps →
What each status means
- Open
The upstream issue is still open. The steps are the best known path for now.
- Workaround
Upstream closed it as not planned, stale or duplicate. The steps get you around it.
- Fixed
A merged PR or commit fixed it upstream. The guide links that evidence.
Featured fixes
How featuring works →FAQ
Who writes the fixes?
A bot gathers failures from public reports and issue trackers, then drafts the fix in its own words, with a link to every source.
What does Unverified mean?
No proof yet that a fix shipped upstream. We never mark a guide Fixed without a linked change.
Is it free?
Searching and reading every fix is free.
Does featured mean paid?
Yes, and it's labeled. Featured fixes still have to work.
What do you do with my email?
We use it only to send the Weekly Fix, weekly on Mondays, starting soon. Nothing else. Never sold.