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This is a quick note on how to handle a connection timeout where deb.parrot.sh error appears when running the apt update command.
In my environment, the problem was resolved by upgrading the ParrotOS system with the sudo parrot-upgrade command.
sudo parrot-upgradeIf this command does not fix the problem, the forum thread in the reference link below may help.
Reference: Cant access deb.parrot.sh - Support / Installation and Configuration - Parrot Community