Stylus is not working

Hello to all!
I have a new tablet Ubook pro Windiws. Unfortunately, the stylus stopped working yesterday.
I changed the battery, but it still doesn’t work. The work of the stylus is important to me. What should I do in this situation.

I’m having this issue too. It has worked in the past, but for some reason now there is no reaction to either the stylus tip or the click buttons. The Pen-and-Ink settings in Windows seem to be accurate and reflect past usage. Windows 10 is fully updated. Is there something else I can check or update?

And does the little green light indicate that the stylus is charging or charged?