Error (-50) while attempting to change exclusion setting.

[jlarmstrongiv]

Not really sure what this means, but I ran into it at: /Users/username/.asdf/installs/ruby/2.6.5/lib/ruby/gems/2.6.0/gems/underscore-rails-1.8.3/vendor

[ziadsarour]

Same here :

/Users/username/Jeux/Minecraft Server/Spigot/Spigot-API/target: Error (-50) while attempting to change exclusion setting.

[tomkyle]

Same here:
/Users/username/.local/lib/node_modules/npm-check-updates/node_modules: Error (-50) while attempting to change exclusion setting.

[Awilson089]

Not sure how helpful this is to most people but running with sudo helped me get past this error

sudo asimov

[hpop]

I encountered the same issue. Enabling full disk access in the system settings for iTerm helped.