can't delete chat

Project Information
Repository: https://github.com/chat21/chat21-android-demo

https://github.com/somrat420

https://github.com/chat21/chat21-android-demo/issues

Expected behavior
it should be delete chat when click on delete

Actual behavior
when click on delete it can't able to delete chats

How to reproduce

• download the app and run it
• scroll on Home button and select a contact
• then come to Chat sector
  and try to delete a chat
• App version: chat21 1.0.9
• Operating system: android 6.0
  Recording Of The Bug