CloudFlare pages custom domain error "It looks like we're having some internal issues."

Good day, I just tried adding a custom domain to my CloudFlare pages project with the my dns provider option. But after clicking begin CNAME setup I get an error page with "It looks like we're having some internal issues." I tried this about 4 hours ago to with the same result. Are there currently problems with custom domains? Visiting the Custom domains tab afterwards shows the domain as "initializing". My page: rentmagic-shop-uldk-staging.pages.dev AccountID: 8c9f69d624df024faafe6b5670e5605c