Receving File not found error

Hello again this will be my second question in a week, I know its a lot but this field is new for me. I have docked two proteins with cluspro and wanted to check the interacting residues with WHISCY however it said:
FileNotFoundError: [Errno 2] No such file or directory: ‘ClusPro_model2_B.pscons’
Why this error occur?

Did you submit the complex?
Best to submit the separate molecules as whiscy works on single proteins and not complexes

Thank you for your answer, I thought it worked based on the interaction. The answering time was so quick ı appriciate that also:)

By the way I have tried with only using one protein and its chain and still it generated FileNotFoundError: [Errno 2] No such file or directory: