Hi, I want to use Protter tool to show the unique peptide selected in skyline in the protein structure (Skyline--Tools--Protter)

But I am getting error, attached herewith.

My operation system is windows 10 enterprise with 11th Gen Intel ® Core (TM) i7-1165G7 @2.80GHz 1.69 GHz; RAM 16 GB, 64-bit operating system
Skyline (64-bit) 22.2.0.255 (c99206313)

Could you take a look at this problem? Thank you very much!

Regards
Dilip