Hi Andreas,
As you can read here: https://support.google.com/adsense/answer/9274516?hl=en
Code must be added inside < Head > section, not inside component area where SPPB works.
For that use PhocaSite plugin (phoca.cz) - free, small & works with all templates.
According to next tip: https://support.google.com/adsense/answer/9190028?hl=en&ref_topic=28893&sjid=10472196793404169905-EU
As You can read it can be also in the center of your page. Then you have to use extra Custom Code module. Find it on JED. Then that module you can choose in Module addon, or use as module in template position(s).
Notice! Raw HTML Addon is for HTML code only, not Javascript that is used by AdsByGoogle.