Hi Ed,
- Google Analytics =/= Google Fonts - those are totally different services, with different API, ID .. and GA tracking ID should be used inside template options, not inside SPPB.
- About error that you got, we have some similar cases, but make sure that you used a correct/valid API.
And yes, We will check it and I hope improve in SPPB 5.0.2 (upcomming).
If you are not from EU country you can use Google Fonts without any API, just in classic way from Template Options. This Font Book feature was created mostly becuase of GDPR law to use font files loaded from your local server, not from Google (USA) servers.
Is all clear now?
The General Data Protection Regulation (GDPR) is a data protection and privacy law that was introduced by the European Union (EU) and came into effect since May 2018. Its main purpose is to strengthen and unify data protection for individuals within the EU and the European Economic Area (EEA).