(I really hope that Windows tag doesn't mean the Bedrock edition. If it does, then I'm referring to the Java edition on Windows 10.)
My friend hosts a server that I used to go on from time to time after he whitelisted me. Then I stopped playing for a bit, changed my username twice since then, and now when I try to join the server it tells me that I was banned from the server, even though he didn't ban me.
He's tried to unban me but it just says that my player name does not exist.
He's tried to whitelist me but it says that my player name does not exist.
He's tried to use my IP address but that didn't work.
He's tried to unban/whitelist the username I used when I first joined the server but it still says my name doesn't exist.
And he tried the other username I had before I changed to the one I have currently. That didn't work either.
We just can't seem to figure out the issue, and we've tried looking it up, but other people who have had this issue never got responses. So I decided to come here for help.