Error spam in server logs

What it says on the tin. running on a 1.21.4 fabric server with c2me, lithium, and nochatreports. everything else should be vanilla. a few players playing, likely without a DH client. Is there a way I can set it to just ignore errors? they don't appear to be causing any problems, though I have not tried to connect with a DH client to check if it's working or not. Additionally, would love a /dh help and /dh help config and whatnot. I have not been able to figure out a single working command from the docs