I am not able to submit my data on the server

I created a form and deployed it, the data collectors was able to collect all the data, when it came to submitting the forms from the phones, all other phone was able to submit to the server except one, I don’t know what is the problem.

Welcome to the community, @yah_ssd_meal_co_unit! Maybe this post discussed previously should help you solve your issue:

And these community posts should also be helpful to troubleshoot your issue.