Custom local repo sync not working: RPM1004: Error retrieving metadata: notresolvable

Getting error while running sync from both Web GUI and hammer CLI. The version of satellite is 6.2.14 ( RHEL 7.5 ).

RPM1004: Error retrieving metadata: notresolvable

repo path : http:///var/www/html/pub/custom-repo-1/custom-test-repo/x86_64/