24 troubleshooting guides
Cursor Errors and Fixes
Step-by-step fixes for the most common Cursor build, auth, deploy, and integration problems.
Quick Answer
How do I fix common Cursor errors?
Start with the exact symptom, then verify environment variables, auth redirects, and integration setup before changing code. These 24 Cursor fixes are grouped so you can go straight to the failing workflow.
Use this hub when
- What this answers
- Which Cursor failure you are actually dealing with, and which fix page to read first.
- Good for
- Auth bugs, deploy failures, stale state, integrations, and billing issues.
- Updated
- Continuously as fixes are added
If this keeps happening
Do not let repeated Cursor fixes turn into a longer stack mistake
Use these next clicks when the issue is no longer just one bug. They are the faster paths when Cursor keeps creating the same class of problem.
Cursor review
Open this when the issue is making you decide whether a more code-first workflow is still the right long-term move.
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Lovable reviews
Open this when the bug is making you reconsider whether a faster generated path would reduce the operational overhead.
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Deploy hub
Open this when the fix is exposing a broader production handoff problem, not just one bug in the code.
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Tool picker
Open this when repeated failures are pushing the decision back up to the stack level.
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Firecrawl review
Open this when the app also needs live web data and the bigger stack question is no longer just about the coding tool.
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Featured Cursor fixes
Cursor Not Understanding My Codebase
Generic answers that don't match your code
Cursor Changing Files I Didn't Ask It To
Modified 10 files when you asked about 1
Cursor Says Context Limit Reached
'Context window is getting long' warning
Cursor Generating Pages Router Instead of App Router
Creates pages/ instead of app/ files
Cursor Agent Mode Stopping Mid-Task
Agent stops partway through
Cursor Suggestions Arrive Too Late to Use
Tab completions appear after you've typed past them
All Cursor fixes
Cursor Not Understanding My Codebase
Generic answers that don't match your code
Cursor Changing Files I Didn't Ask It To
Modified 10 files when you asked about 1
Cursor Says Context Limit Reached
'Context window is getting long' warning
Cursor Generating Pages Router Instead of App Router
Creates pages/ instead of app/ files
Cursor Agent Mode Stopping Mid-Task
Agent stops partway through
Cursor Suggestions Arrive Too Late to Use
Tab completions appear after you've typed past them
Cursor Generating Wrong Import Paths
Import paths don't resolve
Cursor MCP Server Not Connecting
MCP tools not appearing in Cursor
Cursor Using APIs That Don't Exist
Generated code calls functions that don't exist
Cursor Agent Mode Is Stuck
Agent mode starts but never finishes
Cursor Project Fails on Vercel Build
The app works locally but Vercel build fails
Cursor Keeps Breaking Working Code While Fixing Something Else
A bug fix breaks unrelated files
Cursor Supabase RLS Blocking Inserts
Form submits in Cursor but no row appears in Supabase
Cursor Supabase Auth Session Missing After Refresh
User signs in successfully, then gets logged out on refresh
Cursor Supabase Storage Upload Failing
File picker works but the upload fails
Cursor Stripe Checkout Session Returning 400
Stripe checkout creation fails with a 400 error
Cursor Stripe Webhook Not Updating Access
Payment succeeds but the user never gets access
Cursor Stripe Billing Portal Return URL Broken
Stripe Billing Portal opens but returns to a broken page
Cursor Clerk Middleware Redirect Loop
The app keeps bouncing between login and dashboard
Cursor Clerk Production Domain Not Authorized
Authentication works locally but not on the live domain
Cursor Clerk Session Missing After Refresh
The user appears signed out after a refresh
Cursor Resend API Key Missing in Production
Emails work locally but not after deploy
Cursor Resend Emails Not Sending From Contact Form
The contact form succeeds but nobody gets an email
Cursor Resend Emails Going To Spam On Launch
Emails are sent, but they land in spam