It sounds like Command/Event echoes are disabled.
Here's how you can update this setting:
Method 1: XGUIOpen XGUI > Click "Settings" tab > Click "Server" tab > Click "ULX Command/Event Echoes" > Select "Echo admin commands anonymously" or "Echo commands and identify admin" in the first drop-down list.
Method 2: Server consoleUse the "ulx logEcho" console variable to control how ULX echoes commands.
There's 3 different modes:
0 - OFF No output to any players when an admin command is used
1 - ANONYMOUS Output to players without access to see who used the command (admins by default) similar to "(Someone) slapped Bob with 0 damage"
2 - FULL Output to players similar to "Foo slapped Bob with 0 damage"
In this case you'd set it to 1 or 2. So you would run:
ulx logEcho 1
or
ulx logEcho 2