i need help

I was playing a game when a pop - up window suddenly appeared on the game interface. Even after re - logging in, the same pop - up window still shows up, and then the game crashes.

Exception
Attempted to resume pathing action with an invalid skill: 2148073472 object.Metadata/Monsters/MudBurrower/BrambleBurrower@80

Why is no one solving my problem? I can't log into the game now. As soon as I log in with this character, the game crashes and disconnects.