installed the repo like described in docs,
added a working url (works via browser when changed the method to work with navigator.geolocation.getCurrentPosition((location)=>{),
loaded it to android studio.
installed on Xiaomi Redmi X4, device didn't ask for permissions.

app run. pressed the button, server get no calls.

Hello, there's a problem with NPM install.

I can saw it on json file, i don't know why it won't install.

npm ERR! Could not install from "@mauron85\cordova-plugin-background-geolocation@~3.0.3" as it does not contain a package.json file.

First of all I thank you for sharing your knowledge. implement the code from https://medium.com/@chenlitchian/ionic-4-with-background-geolocation-cc57149da36a
and program it to repeat every 30 seconds, it starts in the background and inserts the API, but after a while it stops doing it. I have searched a lot but could not solve the incident. thanks for your help.