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How to change upload size for Upload fieldAsked by acoppola on August 21, 2016 at 12:15 AM upload size
The Upload field on your form must be just using the default allowed file size which is 1MB only.
You can adjust it to allow uploading of bigger file size. Follow this user guide: Changing-the-upload-size-limit
Update your form upload field and try again.
Do let us know if this still did not resolve the issue.