in reply to lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust

I was getting this error while doing twitter authentication with Dancer. So for the total perl newbies like me, what the answer post is saying i, you need to reinstall/update LWP::UserAgent and install/update Mozilla::CA. 
sudo cpan 
install LMP::UserAgen Mozilla::CA

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This is what fixed it for me.
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