Jul 25 2020 05:36 AM
Your diagnostics settings are preventing this device from getting insider builds window 10 20161
Jul 26 2020 03:08 AM
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.
Hope this helps!
Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.