The much-anticipated Disney+ streaming service has arrived. In the first 24 hours, the app was downloaded 3.2 million times. Demand for the new over-the-top streaming service prompted the company to announced that it had exceeded its highest expectations — but with problematic results. Many users were unable to launch the app on its huge opening day. Forty-two percent of users had problems just logging in, while 57 percent reported video streaming issues, according to Internet traffic monitoring site Downdetector.