it's Civil War 2 bullshit.
Short version: Hawkeye, Clint Barton, killed the Hulk. Spider-Woman, Jessica Drew, dated him, was friends with the Hulk, and is besties with Captain Marvel (Carol Danvers). Carol didn't want the Hulk/Bruce Banner to die, but she helped create the situation that made it happen. Spider-woman, trying to clear Hawkeye, tried to infiltrate Carol's space station to see him, but Carol intercepted her. Spider-woman, with her usual stellar decision-making skills, punched Carol for a while, then walked away enraged, telling her their friendship was over.