I am so done with Muzei on Lollipop It basically crashes if you look at it the wrong way. Even with no extensions installed. And if it crashes  good look loading it up again because it will keep crashing until you reset all data from the system settings. That means have fun configuring the whole goddamn thing over and over again. - for the dev: I assume it has something to do with when the app can't load the correct wallpaper - it happened with when photos that I picked where deleted from storage.