Your diagnostics settings are preventing this device from getting insider builds window 10 20161

Hello pradeep_sharma,

Open Settings app, go to Privacy > Diagnostics & feedback and in the right pane of Diagnostic & feedback, change the setting to Full option.

Reference: https://www.kapilarya.com/your-diagnostics-settings-are-preventing-this-device-from-getting-insider-builds

Hope this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.