I received Beta invite this morning.
Followed steps:
Launch the Blizzard Battle(dot)net desktop app and log in.
Select Warcraft III: Reforged from the game list on the left.
Select Warcraft III Reforged: Beta from the dropdown above Install.
Click Install .
There is no dropdown over Install (which is greyed out).
I uninstalled and reinstalled Battle(dot)net. Still no joy.
Any suggestions?
that means that you are not in the beta. just be patient.
Make sure you select beta , like wow retail / classic ?
If you pre purchased the Spoils of war edition don’t worry. I’m still not in but countless people have assured me that i will get in.
If the drop down isn’t there is means they don’t have access yet.
But if he received an invitation, then he should have access.
How did this invite come to you? Via an e-mail?
i got no email but, i am in the beta.
It seems like some people are getting an email when invited and some are not
Yeah. I got into beta last night and I noticed it in the BattleNet launcher. Just now I got the e-mail.
It came via email. So I figured that I was going to be allowed in.
Yeah, well if it doesn’t appear on the Launcher soon, you might want to contact Blizz. Could be a bug.
If this is typical, Ill just wait.
Yeah - ill bug the big boiz if things don’t change.
Thanks all for responding.
Hi there ^^’ i’m in the same position, received the mail but not able to download it yet 
i hoped i could find a solution in the forums but… no.
Same, i get the mail but can’t download the game … :’(
I have the same problem.
I got an invite e-mail but no drop down menu.
Same. Got the email that i was in. No beta download button.
Same here, got an e-mail but I’m not able to download it.
I´m having the same problem.
got my invite mail an hour ago but no download button
Same, I got email like 1h ago, but still don’t have option in bnet to download… 