Why is Appium not detecting elements on the page?

Appium may not be compatible with the latest version of a mobile operating system for various reasons.

• One reason could be that the latest version introduces new features or changes that Appium has not yet been updated to support.
• Another reason could be that the latest version introduces changes that break compatibility with Appium's existing implementation.
• Additionally, it could be that the Appium team has not yet had the time or resources to test and verify compatibility with the latest version of the operating system.
• Another reason could be that the latest version introduces changes that break compatibility with Appium's existing implementation.

http://appium.io/docs/en/2.0/