It’s happening again. After viewer demand for the “True Detective” finale overwhelmed HBO’s streaming service last month, HBO Go customers took to the Web again Sunday night to complain that they couldn’t access the fourth season premiere of “Game of Thrones.” Like it did with the “True Detective” finale, HBO Go’s Twitter account acknowledged the technical problems. “Looks like there’s trouble in the realm. Apologies for the inconvenience. We’ll be providing updates, so please stay tuned. #GameofThrones,” it tweeted.