Can't type or talk

I have this problem with a glitch… I can’t speak or talk in-game.

I’m not gagged on the server.

How do i fix this?

Go into your Options>Keyboard Controls menu and make sure Chat and Voice is bound to keys. There you go.

It could also be lag.

Couldn’t be lag.
Unless he says that the Chat interface doesn’t show up.

The chat does show up when i press y or u, I can see the letters appearing as I press the bottuns… BUT THEN I press enter, the chat log disappears, but the text doesn’t show up.

Also when I press the voice bottun, the namebox shows up, the microphone is set and everything, but noone can hear me.

Have you tried reinstalling Garry’s Mod?

Also, try:

say "text"

in the console