I am having the same problem. According to this other question, its simply not possible anymore unless you set up your own server basically:
https://community.kobotoolbox.org/t/provide-the-ability-to-edit-kobo-submitted-record/23766/14
What is strange about this to me is that this used to be possible. I work with a very widely distributed team who I rarely have access to and who rarely have internet access. If i need them to check and edit a submission, the best thing used to be to send them a link and have them edit it when they managed to receive it. Now, i have to wait till i physically see them and have them bring their records, because the links only last minutes.
Kobo also seems to have removed the inclusion of repeating groups in wide format in the databases. This used to simply be there, but i have had to modify all my data management scripts to accommodate this change.
These two changes have made my data management a lot harder than it used to be, and I do not understand why they were made.
