Auto complete not working

Hello,

First of all, thank you so much for this great plugin! I use it for some years already.

Please help me out with an issue that I can not resolve: I have just updated your plugin to the latest version (WP as well) and the auto complete still does not function. Do you have any idea what I shell do to get it work?

I also do not see where to add my own API key?

Thank you so much for your help!

Kind regards,
Gabor