I have a raspberry pi, with rpi os lite.
I ssh into it and have been using it for some time.

Now all of a sudden, I get the following error message upon every ssh:

Unable to connect to X server
Failed to connect to X Server.

Which doesn’t make any sense for I am not requesting an X server.
The command I use to ssh is:

ssh -i 'private_key' ip_address;

Why does it all of a sudden, display this, apparently silly error upon every ssh request?

I have tried googling it but they are all actually trying to get -X access.