The Sims 2 Legacy Edition: Cheat Codes Not Working? Error Code

Hi! I'm familiar with how to open the cheat menu and when you type in a cheat correctly, the cheat menu bar goes away. But when I type in the debug cheat "boolpropTestingCheatsEnabled true" I get this popup. I'm unsure of what it means, but I'm able to do other basic cheats like kaching or motherlode.

ERROR TSCheatSystem: ERROR IN CHEAT: Unknown command

in command 'boolpropTestingCheatsEnabled true'. OnErrorClearParserTempState called.