For me, to resolve this, I just had to follow the second warning's link on https://appstoreconnect.apple.com/:

When working with mobile ads through Google AbMob: Asset validation failed Invalid Bundle. The bundle Quote Droplet.app/Frameworks/GoogleMobileAds.framework does not support the minimum OS Version specified in the Info.plist. (ID: 26fe9a03-712f-4f39-93ca-5d5e7a942ffc)