Error when doing sudo apt-get upgrade

I get the following error message after running “sudo apt-get update” and “sudo apt-get upgrade”

Failed to fetch https://files.husarion.com/repo/pool/rpi/r/raspberrypi-firmware/raspberrypi-kernel_1.20181112-1_armhf.deb GnuTLS recv error (-9): A TLS packet with unexpected length was received.

Hi danieltapham,

Please check this topic.

Please let me know if it helps.

Best regards,
Hubert