Facing issue in building graph model's xml for 'CoregistrationOp'

Hello, I’m trying to co-register a slave tif with a master tif using the CoregistrationOp graph processing tool. When I select the master or tif files from the mask band drop down menu, no options display. I’ve tried everything, including using the layer stacked tif file, but nothing seems to work. My goal is to use the graph model’s xml as a starting point for processing with Python. I’m also curious to know if CoregistrationOp and Gefoki coregistration are the same. However, I was unable to locate any options for including Gefoki in the graph builder. So I’m searching for assistance with this.

Please see the screen shots attached as well