I Had No Trouble At All
I agree it would be easier to just use Ticketmaster but you can’t download this app and access your tickets until 48hrs before your event. I received the email and it told me that my tickets would be ready at 7:30 that night. I downloaded the app and signed in for the first time after 7:30pm and my tickets were right there. I would recommend waiting until after your set time to login for the first time.