I’m getting the error message at the point where I’ve chosen the fields and selected Start Import. I’ve double-checked the date fields, and they’re formatted in the American style:
This is the what the error message looks like:
I thought it might be because I’d included a section task with no start or due date, but even after I took the section task out, it still didn’t work. The tasks that contain start dates don’t import at all, but they do when I remove the start dates from the csv file.
In case it matters, I’m using Chrome, Version 63.0.3239.132 (Official Build) (64-bit).
Let me know if you need any more info.