Set Tags feature not working in "A photo manager". .

Expected behavior

The app should be able to tag photos.

Actual behavior

The app is not able to tag photos.

How to reproduce

• Choose any photo.

• Click on the icon at the top right corner of the app, you see different options there.

• Click on Set Tags option.

• Write any tag.

• Click on Tick option(✔️), it shows updated zero (0) photos and you would not be able to tag photos.

• Application :A Photo Manager.
  Version :Version :0.6.4.180314

• Operating system: Android Nought (7.0)

Recording Of The Bug