Artifact upload failed. Invalid maven artifacts

I am trying to upload a manually created bundle as guided by (https://central.sonatype.org/pages/manual-staging-bundle-creation-and-deployment.html#signing-components). The jar file and the full source are attached.

but the attempt failed. screenshot is also attached. Can you help me find out what is wrong with my bundle. Thanks

The only possible cause I can think of is, maybe, my library jar is actually an Android aar file. It uses aar instead of jar as extension