Bixel -- a getaddrinfo failed error means the plugin cannot connect to the internet (or at least resolve that particular website). Can calibre connect to email books, download metadata, fetch news recipes?...
Your antivirus may be blocking calibre from connecting to the network.

Make sure calibre is on the exclusions list.
grognard -- see this post:
https://www.mobileread.com/forums/sho...postcount=3746
Add this to your personal.ini for the affected website:
Code:
use_ssl_unverified_context:true