I am trying do automation on NSC website but getting following message
Attach Browser ‘msedge.exe NSE’: Could not find the UI element corresponding to this selector:
The closest matches found are:
[70%]
[54%]
It’s because the selector isn’t available on the screen or the selector is dynamic and you should be building a stronger selector for the Ui Element.
Thanks,
Ashok 
Its because some of the selected are changing based on page data, Pls create more dynamic selectors and validate which is more reliable & Unique.