How to solve "Unfortunately, Launcher has stopped." Galaxy Note 4?

I'm receiving this error after enabling ultra power saving mode: > "Unfortunately, Launcher has stopped." Its dialog only has the option "OK". Restarting doesn't work. Clearing cache partition through recovery doesn't work. I can access settings by pulling down from the top of the screen but the settings menu is not complete; It only has Wi-Fi, Bluetooth, Airplane mode, Mobile networks, Location, Sound and Display entries. My device is not rooted. It seems that the device is still on ultra power saving mode, even after clearing cache. I have the option to factory reset through recovery but I prefer not loosing my data, if it's possible. What can I do?