Hi there,
thanks for reaching out.
I am correct, assuming you are using the jnews theme and their ad placements with manually placed AdSense code at the moment?
To integrate with Advanced Ads I suggest creating manual placements and using their shortcodes on these theme ad positions to be able to control all your ads via the Advanced Ads placement overview.
After that, you can try using a dummy or image ad to confirm if all these positions are working as aspected and assign your imported AdSense ad units to these positions afterwards.
If you want to make use of the content placement from Advanced Ads I also recommend trying this with an image ad first to ensure the ad is placed at the right position.
If the AdSense ads are not sowing, please see this list of usual issues first and send me a link to the page where the ad is placed by Advanced Ads but not showing if you want me to take a closer look.
Best regards,
Henning