Can you ping a remote server? If yes it's likely the dns or dhcp client not receiving dns settings. Systemd makes it even more complicated with systemd-resolvd. Check your /etc/resolv.conf. The nameserver IP should be specified there. Try running dig @<ip> somedomain.com. It must return an IP or a CNAME. Sometimes it's also a DNSSEC issue.
#No connection (DNS?)
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