The node Date&Time Difference was deprecated, and I’m substituting for the new version.
But it didn’t work!
The Ok button is not available, and when I change granularity, I receive a Java error message.
I discovered that you need to create a new node, save it with a basic configuration, open it again, and add the configuration. The field granularity has an error in the first open.
thanks for reporting! We already found this internally a couple of days ago and track it under the internal ticket UIEXT-2839.
The issue seems to appear when changing the “First date&time column” if Output type “Number” is selected. Another workaround I found is to set the Output mode to Duration, click OK, open the dialog again and change the output type to the desired “Number” output.