Hello and welcome to justanswer, My name is ***** ***** i will be assisting you today,
I'm sorry about the issue, please follow the steps below and let me know the results :
Has everything worked out, do you still need help please?
Please download SD Maid (a system cleaning tool) from google play and run it, this will clean temp and cache files from your phone then try the same instructions, if the problem persists please reply back to me and i will gladly continue to help.
Please try to uninstall the application and reinstall it again.
hope it works,