KAMPALA, Uganda — A Ugandan court on Friday invalidated an anti-gay bill signed into law earlier this year, pleasing activists and watchdog groups who called the measure draconian and wanted it repealed. The Constitutional Court declared the law illegal because it was passed during a parliamentary session that lacked a quorum. Activists erupted in cheers after the court ruled the law “null and void,” but some cautioned that the fight was not over: The state could appeal the ruling in the Supreme Court and legislators might try to reintroduce new anti-gay measures. Also, a colonial-era law that criminalizes sex acts “against the order of nature” still remains in effect in Uganda, allowing for continued arrests. More