GOT THE FIX!!!! I just spent several hours on the phone with Adobe tech support. If you push play and it only plays for a few seconds and stops it has to do with permissions on your account on your computer. Try going to settings> Users> and opening up a new user acct. Log out of yours and open up the new one and see if it doesn’t work. A lot of the other solutions posted on here are loop holes and temporary fixes but you won’t have a solid fix until you solve why your main account does not have full administrative permissions.
I’d suggest either calling Adobe Tech Support, 800-833-6687 or looking on line. Usually opening up a new account and setting it as the administrator will solve this. Otherwise it can get somewhat technical. Mine works better now than it did before.