Created a responsive form using Nintex in SP2019.  The form contains a Calculated Value control that performs a lookup function.  Nothing custom, I just want to display a related column from another list to the user and bring it back to a connected column.  Works perfectly fine using the responsive form from the desktop - value is displayed and written back to the connected column.

 But when the form is loaded using Nintex Mobile, a message appears about where the control would be stating "A JavaScript exception has occurred".  The form is useable, but the calculation is not performed so the end user cannot see the info, and "A JavaScript exception has occurred" is written back into the connected column.