Google : Followers are not counted

Because you need to set up your Google API Key.
See how you need to do: https://www.youtube.com/watch?v=EAQA-tJUWas

Thank you. I already did it (in fact it worked before updating), but for some reason, creating a new project has worked. The counter is up again.

I initially tried a G+ API Key from a pre-existing project, but the result was a big 0. Only when I tried a new project did this finally work.

Thanks to both of you!