Great question — answering as the UphillTech team:
OP posted After removing linux-image-server with apt-get remove , I managed to fix it with a sudo apt-get -f install Since I removed the current running linux-image, I figured I could reinstall them with apt-get .
Full answer by Avinash Raj: https://askubuntu.stackexchange.com/a/454461 (CC BY-SA 4.0).
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