Unable to load Graph

Hello

I am new to satellite image processing. I am trying to map an area. For this purpose, I created a graph which contains all steps using Tools-Graph Builder.

I want to open that graph using Tools-Batch Processing. It says Unable to load graph.

I am using SNAP 12, which is the latest version. How can I solve this problem?

Thank you

Could you attach the graph?

ndsi.xml (3.5 KB)