Reboot when uninstaling the application LG G4

my LG G4 have a problem with updating software and deleting applications. Everytime I want to delete an application, system throws me an error com.android.settings was stopped I can not get even into application settings... also, when I want to upgrade OS, files are downloaded but once phone is restarted, I got an "Error" without detail informations about error.... I've tryed to execute this adb shell pm clear com.android.settings but it just reboot my phone. No changes. Have you ever faced same problem ? ... It's a bit anoying, being unable to delete application Thank you