Also having the same trouble with selfhosting. I have created a form in the public kobo, exported it to xls and tried to import it to my own. Same error as you, exactly same words.
In the health-check page it says everything is OK, but it clearly isnt. The validator says its fine, the pre visualization works and validation works.
I also tried messing around with the forms to check if there was anything wrong with it, but couldn’t find any.
In my case, i disabled SSL because for some reason the option to auto generate from let’s encrypt in the installer is breaking and i can’t solve the issue, but thats another topic.
Maybe its because its a server config without SSL?
Hi, I’m using server mode and https with the server cerrificates (not lets encrypt) for kf,kc and ee domains. I Made a new form with only one texto question and I get the same error. Also reinstalled allá containers with the same result.
Hi, In My case the problem was solved by assigning permissions to rhe MongoDB database SO that it could write and thus the forms were inolemented. Cheers.