If respondents see an error when submitting, walk through these checks in order.
Step 1: Is the form published?
Open the form. The toolbar button at the top-right should say Update (or show a green Live badge). If it says Publish, the form is still a draft — public visitors get a "Form not published" page when they hit the URL.
Fix: click Publish.
Step 2: Is the form scheduled to be closed?
Open Settings → check the Opens at and Closes at fields.
- If Opens at is set to a future date, the form shows a "Coming soon" message instead of accepting submissions.
- If Closes at is set to a past date, the form shows a "Form closed" message.
Fix: clear the date, or move it.
Step 3: Have you hit your monthly response limit?
Open Account settings → Plan. The card shows X of Y responses used this month. If X >= Y, new submissions are rejected with a "limit reached" error until the 1st of next month.
Fix: upgrade to Pro for a higher cap, or wait for the monthly reset.
Step 4: Is a required field hidden?
If you added a required block but conditionally hid it via custom CSS or via prefilling an empty value, respondents can't satisfy the validation. They'll see "Please fill in all required fields" with no visible field to fill.
Fix: remove the Required toggle from any block that's hidden or moved out of the visible flow.
Step 5: Is the file upload too large or in the wrong format?
File Upload blocks reject files over 5MB or in unsupported formats. The respondent sees an inline error on the upload field, not a global submit error.
Fix: increase the per-block limit in the block's settings panel, or accept additional formats.
Step 6: Still failing?
Email support@nodumforms.com with the form URL and rough timestamps. We can check the server logs for failed submission attempts.