What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I have tried download the submissions to Excel of your form and was able to download without any issue.
Could you try accessing the form on a different browser and see if you are able to export the submissions to Excel? As mentioned in the other post, you may also try generating an Excel report from the Reports.
If you want to share the form to someone, you may consider adding the user as a sub-account user and share the form. Please refer to the guide below that can help you with using sub-user accounts.
Hope this information helps!