Pokémon go pokémon escaping [duplicate]
You're just softbanned for a bit. Wait for 30 minutes to a few hours and you should be able to start capturing pokemon again.
Source
This is how they suspend accounts who break the rules, such as GPS Spoofing. You will still be able to access the game, but unable to collect from pokestops and everything will escape. I've heard it only lasts an hour or two right now, but can't confirm from experience. Down the road punishments may get more severe so I would highly recommend playing the game legit.