Hi, @Anonymous and @StalinPonnusamy.
I know this is an older post, but I'm running into the same issue. If you solved the problem, do you remember how you did so? If I set the data card's Required property to "true," the form won't submit the first time, but it submits the second time.
I have a gallery with its Items property set to a multi-select SharePoint field. The OnCheck property of the checkbox creates a collection:
Collect(myCollection, ThisItem)
The OnUnCheck property removes the selection from collection:
Remove(myCollection, ThisItem)
The Default property of the checkbox is:
ThisItem.Value in myCollection.Value
The Update and Default properties of the data card are set to the collection:
myCollection
If the data card's Required property is "false," the form submits just fine. However, if the data card's Required property is "true," I get the error below. If I click the submit button again, the form submits as expected.
