when i try to send a message in the chat, i get this message: “Chat is temporarily unavailable because this account is under review. Please wait a few hours before restarting the application and trying again. This account can continue play in the meantime.”
how long will it take to let me message people?
However long it takes for them to review your account for the reasons your in-game chat abilities were silenced. And that is if they allow your account to chat again after the review. With it being the holidays, it is going to take longer for reviews and tickets to be processed.
If you continue getting the same message after 24 hours, you can try submitting a support ticket:
Submit a support ticket for Diablo II: Resurrected
After the review, if they uphold the account chat suspension, you have one last shot where you can try to appeal the decision:
Submit an appeal to an account action for Diablo II: Resurrected
nice… chat didn`t work since i bought the game… 
I have also run into this issue on a brand new account. I purchased a second key this morning and noticed I was muted on the account.
Has this issue been resolved for you yet, DJ?
I got the same issue on several new accounts.
I wonder if Blizzard allow one person to have multiple accounts？
Same problem. Just bought D2R. Cant chat
Same problem, I just bought the game and that message appears when I enter the chat, could you solve it?
Don’t even worry about it. No one can chat anyway it still doesn’t work lol.
wtf stop buying the game
Been like this since launch and has no mentions in any patch notes to fix it.
Same here just started my account today and cannot chat at all …says under review