cant chat when I press enter key on roblox

toast, I might suggest that this is probably not the best forum to find information on a video game. iFixit is focused on hardware repairs for various devices of all kinds and as such is rather limited on its support for software of any kind.

I would suggest you seek out Roblox forums where users can ask questions and search for information. Something like this might be a good place to start.

https://www.robloxforum.com/