Same issue on multiple Ubuntu 20.04 VM's. My fix differs since the name of my adapters differs, but my solution similar:
sudo dhclient -r enp1s0 && sudo dhclient enp1s0
Same issue on multiple Ubuntu 20.04 VM's. My fix differs since the name of my adapters differs, but my solution similar:
sudo dhclient -r enp1s0 && sudo dhclient enp1s0