MINNEAPOLIS – After a five-year reign as the undisputed best hooper on the planet, Nikola Jokic’s championship belt is on the line. There’s no debating the No. 1 reason Denver’s season is on the brink in the first round of the NBA playoffs. The greatest player to ever wear a Nuggets uniform has stunk. In three playoff games against the Minnesota Timberwolves, with all the magical strings he regularly pulls coming up empty, Jokic has often appeared to be at the end of his rope, on the verge of letting go, befuddled by a clunky shooting touch that has betrayed his disbelieving eyes.  “It’s frustrating,” Jokic admitted after a 113-96 loss to the Timberwolves in Game 3 that saw him shoot 7 for 26 from the field and suffer through the worst playoff performance of his brilliant pro career. Where have you gone, Joker? Nuggets Nation turns its lonely eyes to you. He simply does not look like his MVP self.…