Error in snap2stamps stamps export step

When i run “python project.conf”, I got the following error. But in the end it seems to have successfully exported the file, I don’t know if this is an error that can be ignored. If it is an error that cannot be ignored, how should I resolve this error?
I would be very grateful if anyone give me some idea.

have you seen this topic? SRTM ZIP-files are corrupted or not found