@SanthoshPrasad Dremio does not make their public/private repositories listable. This leads to a lot of confusion for everyone.
In your case, you can’t tell if the dependency is actually missing from Dremio’s Maven server, of if you are just having trouble connecting to their server because of local issues, or if their server is completely down… I tried asking that they make their Maven repo’s listable (link below), but received no response.