I actually PM'd Xalos about this recently.
I already deleted the original PM that he sent me, but I'll try to repeat what he said as well as I can.
This is due to a change that Badspot made with the environment controls without warning anyone. Thanks Badspot.
What you need to do is look for, in the server.cs code, a line of code that says fuction servercmdEnvMaster(%cl)
You'll see this:
function servercmdEnvMaster(%cl)
{
if(isObject(%cl) && !%cl.isSuperAdmin)
return;
if(!isEventPending($EnvMasterLoop))
{
if(!isObject(EnvMaster))
new AIConnection(EnvMaster) { isAdmin = 1; isSuperAdmin = 1; environMaster = 1; };
You need to replace the word AIConnection with SimObject
Replacing the word "AIConnection" with "SimObject" will fix the problem.