It's not offensive, just irritating
This movie looks charming, and as other reviewers said it's totally inoffensive...except for the casual sexism. The knight Rusty is basically an impulsive jerk to his princess pal and friends for most of the movie, then he _sortof_ figures it out and redeems himself, but not without continuing to joke about how he still wont help her clean up. Adorable. There's a running joke about the ugly fat woman having a crush on the handsome prince, as a bonus. I was uncomfortable watching it with my son, because he wanted to like the main guy- kids are too little for antiheroes- and I kept saying, "Oh, but it's ok, he'll figure it out.." But he only half did. Ugh.