TOKYO—Poland granted a visa Monday to a Belarusian Olympic sprinter who said she feared for her safety and that her team’s officials tried to force her to fly home, where the autocratic government was accused of diverting a flight to arrest a dissident journalist. An activist group that is helping athlete Krystsina Tsimanouskaya told The Associated Press that it bought her a plane ticket to Warsaw for the coming days. The current standoff apparently began after Tsimanouskaya criticized how officials were managing her team—setting off a massive backlash in state-run media back home, where authorities relentlessly crack down on government critics. The runner said on her Instagram account that she was put in the 4 x 400-meter relay even though she has never raced in the event. The runner was then apparently hustled to the airport but refused to board a flight for Istanbul and instead approached police for help. …