"Effective January 15, 2020, The Central Repository no longer supports insecure communication over plain HTTP and requires that all requests to the repository are encrypted over HTTPS."
"Beginning January 15, 2020, The Central Repository will no longer support communication over HTTP. Any attempts to access http://repo1.maven.org and http://repo.maven.apache.org/ will result in an error, and users will need to update their builds to resolve dependencies over HTTPS."