messaging Xperia m5

[Logrand]

Hi Since I have the Xperia m5 to put me in charge the following message appears: UNFORTUNATELY MESSAGING SERVICE HAS BEEN STOPPED.Is very annoying as it does twice times.Can you help me thanks?.

[Phy]

Do you experience the same while on safe mode?

How to boot on safe mode
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

How to boot on safe mode on Lolipop
1. press and hold the power key
2. once you get the pop up menu 
3. press and hold "power off" 
4. Boot on safe mode should become available