Fixed price covers one root cause in one project.
I reproduce the error in your environment, not only on my machine; change the minimum that closes it; run the project and check the result; then send a report: what broke, what I changed, why it happened, what to watch so it does not come back.
You get the fixed project archive, a README with the exact run commands, and a run log with screenshots of the flow working.
Not included: the second and later root causes in the same project, new features, design and layout, written text, bot-check bypassing, accounts I do not own.
Delivery: 1 business day after the input data is complete. Two revision rounds on the original error list within 3 days after delivery.
What I need from you: the project archive or access (git / FTP / SSH / hosting panel); OS plus language and framework version; the full error text or the step where it fails; what changed right before the break (update, migration, someone else's edits). If the input data is not enough, I ask in the chat before accepting the order.