Error in processing Phase to Displacement Step

I am trying to invest an active landslide and I follow the steps as shown in TOPSAR

In the step that I am trying to convert the phase to displacement an error occured as shown in screenshot and I don’t know how to proceed. Please if anyone knows how to solve the problem, I will appreciate it, thank you!

It looks like you have made the terrain correction step too early - unwrap still in radar geometry.