Question Please Help it's really confuising .. !!

Hey guys I do not really get this when i wanna update an app from play store using data mobile the download progress reach the 100% but then instead of installing the app it does reload the installation progress from 0% and when it reach 100 % it shows me the 919 problem while i do have free memory on both external and enternal and what i do not really get if i try to uptade via wifi it works !!! but with mobile data nop which i confirme that i have a strong enough signal

any suggestions please ??? thx in advance