System information > Log files > Call Processing > cp_system_log_2020-10-12_17-29-59
lol... Gotcha... Normally I don't bother looking in that stuff unless there is a user reported problem or something failing. There are a lot of "error" messages in Mitel that are really just warning or informational, if your not having a problem and there isn't something "off" like high RAM/CPU usage or something else not working, just ignore it.