Output from running yay or pacman -Syy gives:
error: failed retrieving file ‘endeavouros.db’ from github.com : Could not resolve host: github-production-release-asset-2e65be.s3.amazonaws.com
error: failed retrieving file ‘endeavouros.db’ from github.com : Could not resolve host: github-production-release-asset-2e65be.s3.amazonaws.com
error: failed to update endeavouros (invalid url for server)