I'm having a SPO list with many fields in it. I have created the form with Nintex for O365 and while testing it, I'm not able to submit the item. While I did some googling about the issue - I have been asked to check if my lookup columns are connected to columns. But still facing the below issue.
"Invalid data has been used to update the list item. The field you are trying to update may be read only."
I found a similar post and haven't been answered. Hence posting again.