I got that very same thing here is how I fixed it deleted every thing on hard drive and what was saved on online storage then intalization your ps4(its the last thing it the settings menu ) just to be sure, then reload every thing believe me I know im on my second ps4 before we figured out I was down loading bad files off of the online storage .you will lose all game saves and all stuff on ps4 but it fixed my problem. I was ready to brick the whole system call Playstation they were less than no help .
but this is what worked for me finally