I've set up Ubuntu Server 18.04.4 LTS on a PC to install a medical software for use in my clinic in Ethiopia.
I wanted to connect it to a WPA Personal wireless network. Since I don't have an Ethernet port, I've downloaded wpa_supplicant on a USB and installed it from there. I've followed the instructions on https://www.linuxbabe.com/ubuntu/connect-to-wi-fi-from-terminal-on-ubuntu-18-04-19-04-with-wpa-supplicant on how to configure wpa_supplicant and to auto connect the server to WiFi on startup.
I did not configure Netplan (which has only a file named 50-cloud-init.yaml). I only followed the guide on that website.
I've been able to connect it to the WiFi and obtain an IP address but after rebooting no IP address was assigned and when I ran the "sudo wpa_supplicant -c /etc/wpa_supplicant.conf -i wlp3s0", I got the following error:
I would appreciate any help in this matter.