Fix LangChain create_react_agent 'unexpected keyword argument prompt'
The TypeError comes from a kwarg rename between langgraph versions - or the wrong create_react_agent import entirely. Here's how to tell which and fix it.
Topic
Troubleshooting
Error-fixing (combine with How To)
How to fix Cursor's Terminal sandbox error on Linux (AppArmor)
Cursor's terminal sandbox fails on Ubuntu 24.04+, Fedora, and Arch because of an AppArmor namespace restriction -- here's the two-command fix and why chmod 4755 makes it worse.
Fix Claude Code MCP "Failed to Connect" (Bun Runtime Bug)
curl reaches your HTTP MCP server fine, but Claude Code's CLI still says 'Failed to connect' -- here's why the Bun runtime is the actual point of failure, and three ways around it.
Fix LangChain Output Parsing Errors (handle_parsing_errors=True)
handle_parsing_errors=True only retries LangChain's free-text ReAct loop -- it can't fix a model that won't format output reliably. Here's what actually works.
Cursor Override OpenAI Base URL Breaks Anthropic Key: Fix
One Cursor settings toggle causes three different Anthropic API key errors. Here is the exact fix and why it can silently undo itself.
How to fix the Cursor Provider Error that lasts for days
Most persistent Cursor Provider Errors aren't a network problem — they're caused by a conflicting MCP server. Here's the fix sequence that actually works.
How to fix the Cursor Connection Error when the agent stops working
The same 'Connection failed' error hides four different causes. Here's how to diagnose which one is hitting you and apply the right fix.
How to fix n8n nested loops: the inner loop retains completed state bug
The inner Loop Over Items node skips processing after the first outer iteration because it retains its completed state. Here are the three fixes, including the Done-branch chain pattern that avoids the bug entirely.
Make scenario won't trigger: 7-step webhook diagnosis
Seven sequential checks to diagnose a Make scenario that won't run: covers webhooks, polling triggers, incomplete executions queue, scheduling, and timezone issues.
How to fix n8n OAuth callback URL returning 401
Three causes of the n8n OAuth callback 401 and the exact fixes: WEBHOOK_URL mismatch, stale credentials after a domain change, and X (Twitter) OAuth1/OAuth2 endpoint confusion.