Why am I unable to add music files to Google Play app in Oneplus One after a resent update?

[AC Question]

Not able to add music files to Google Play app in Oneplus One after a resent update

Recenty i have updated all the apps Through Google Play Store, From the iam not able to see any music files in foofle play app.but i have music files in my FileManager and iam able to play those files from it. I have also downloaded MX player but no files exists in mx player also. Plz respond on this.