Personally I’m not familiar with night watch add-on perhaps you mean “Nightwing add-on”.
If yes this should be compatible with kodi 19 and above.
FYI
Almost all older Kodi Add-ons aren’t compatible with kodi 19. And above, because those were written in python 2.7, and kodi version 19 and above with python 3 and above " python is programing language".
To install the correct kodi add-on compatible with your kodi version. First check your kodi version if you still using holder version less than 19 consider update to later version.
In the link above in my earlier post “Best Kodi Add-ons” click on it and scroll down to table of contents you will see a list of kodi add-ons.
With each add-on the name is given in addition kodi 19/18 add-on.
“It will not show the complete version number eg 18.9 or 19.3, only version 18 or 19”
example : The Promise kodi 19 add-on this add-on is compatible with kodi version 19 and above.
To install the compatible add-on with your kodi version just click on the link and follow up with the construction.
Note: If you can’t see the kodi version add-on next to the kodi name mostly it will show in the next page.