Hello.
First of, I use linux. Even tho this error has very little to do with that.
I was trying to add a member to a group using !admin add Test Nick
It told me the person was added, but the logfile gave me an error.
At line 220 in Admin.php there is a small error or typo. It says.
query("INSERT INTO admin_members (id, admin_group) VALUES
it should in fact be like this
query("INSERT INTO admin_members (name, admin_group) VALUES
because there are no id post in admin_members
//Kilajan