Glitch with daily mission - art gallery

Does anyone else have this glitch with the daily mission where you need to fight the monster in the art gallery but when you start the fight he isn't there? The timer just runs but you can't progress because there's no monster to defeat. Also bychallenging again nothing changes and one ca only quit. But the mission doesn't reset so I'm stuck with it and can't get another one the day after. Is there a solution?