somebody else had a similar problem in the comments so I wanted to address if you found the fix for the "cannot read property 'createtexture' of null" screen
i only ever get that when attempting to test battles from the editor, because it doesnt initialise the live2d properly
but i figured theres enough of a wait at the start of the game with the disclaimer and title that it wouldnt happen (if its happening in places that arent the first time live2d is shown, then i havent a clue)