I’m experiencing the same problem, and the import assets functionality suddenly stopped working for me as well. It was working before, but now it doesn’t seem to function at all.
Unfortunately, we have identified a problem related to the import of Assets data, and the team is currently investigating it.
We have opened an incident on our status page (https://status.eazybi.com/), and you can subscribe to notifications to be informed when the problem is fixed.
I apologize for the trouble caused to you.
Kindly,