A fix has been implemented and we are monitoring the results.
Posted 9 days ago. Jul 10, 2018 - 11:40 CEST
We have found an issue with the Flow app version 2.5.1 causing submissions to not upload to Flow's instance. This app version is no longer available until we resolve the problem. For those who have updated your Flow app to 2.5.1, please, use our bulk upload functionality to get your submissions to your Flow instance.