as the title suggests I am unable to connect to my server using ssh.
This happened after I ran
sudo apt update && sudo apt upgrade.
I already tried logging in with multiple users and I tried to reboot the server.

The error message says:

OpenSSH_9.3p2, LibreSSL 3.3.6
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/* matched no files
debug1: /etc/ssh/ssh_config line 54: Applying options for *
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug1: Connecting to xxx.com port 22.
ssh: connect to host xxx.com port 22: Connection refused

What can I do?

Thanks for help in advance.