This is the error that appears
EDIT: Just saw this warning as well
LogStats:Warning: MetaData mismatch. Did you assign a stat to two groups? New //STATGROUP_Threads//FTcpMessageTransportConnection///Thread_d84_0///####STATCAT_Advanced#### old //STATGROUP_Threads//FTcpMessageTransportConnection///Thread_3384_0///####STATCAT_Advanced####