I haven’t heard any actors involved say anything of that nature, I guess we’ll have to wait few years for a reveal all memoire or book to really know what happened behind the curtains.
They were polite about it, but read all of their interviews and it’s all there. Even Lord & Miller’s remaining scenes kinda show the much sillier tone (Han speaking Shyriiwook, etc.); it shows a film that no one would’ve taken seriously.
They wanted to make a spoof while Lucasfilm, the writers, the producers, and the cast wanted to make a Star Wars movie.