Would you mind cross-checking if the issue still persists. Seems like you are having issue with the OCHA server. When i tried submitting a filled up form in OCHA server i did not see any error message as you are seeing.
Welcome to the community! Could you be kind enough to upload a screenshot of the error message you are seeing. Also please help us by informing the server (i.e. OCHA or HHI) which has this issue.
Welcome back to the community, @pevans! Could you also share a screenshot of your issue with the community so that the community can help you solve it?