Similar issue on Docker Hub in the last hour or so:
Cloning into '.'...
Warning: Permanently added the RSA host key for IP address '140.82.114.3' to the list of known hosts.
Switched to a new branch 'develop'
Pulling cache layers for index.docker.io/atomgraph/linkeddatahub:develop...
Push failed. Attempt 2 in 60 seconds.
Done!
Executing build hook...
WARNING: Support for the legacy ~/.dockercfg configuration file and file-format is deprecated and will be removed in an upcoming release
Sending build context to Docker daemon 81.77MB
Step 1/65 : FROM maven:3.6.3-jdk-11 as maven
Head https://registry-1.docker.io/v2/library/maven/manifests/3.6.3-jdk-11: unauthorized: please use personal access token to login when SSO is enforced
build hook failed! (1)