Well to find out your problem I need to replicate it. You can text me on discord: https://discord.gg/XqTaqUcdb2
I need to know the website you tried to download from. The series name/link, season and episode range, provider and language. Also a screenshot of the terminal would be nice.
If you do not have discord, you could also send an email to ninjaminebro@gmail.com
Happy to help out.
-NMB