Help with JS please

I also get a warning that app ownweather is also listed as data file for weather.
Now, I have not listed anything as weather data.

When the tests are run all apps are checked for errors and warnings, and that warning has been present for some time. It's almost certainly not anything you've done now. :)

but still get the error " has no supports field or is no array" [...] what I think is that the metadata is maybe incomplete.

Yes that is probably the problem. If you look at metadata.json in the example app you'll probably work out what's needed. (Specifically line 8 )

The comprehensive (I believe) list of possible metadata entries is in the BangleApps-repo README.