W: GPG error: https://repo.skype.com stable InRelease

Did you got error something like this, whenever you get update ubuntu "sudo apt-get update" in terminal?

W: GPG error: https://repo.skype.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3

ANS.

According to https://repo.skype.com/, run:

curl https://repo.skype.com/data/SKYPE-GPG-KEY | sudo apt-key add -

in a terminal