The error is thrown by the GIT Repository server, because the “Verify Committer” is enabled in your repository setting.
To resolve the error, I would execute the following command from VQL shell:
SET 'com.denodo.vdb.vdbinterface.server.vcs.VCSConfigurationManager.useLoginAsAuthor' = 'false'
For more details, refer to [Commit](https://community.denodo.com/docs/html/browse/7.0/vdp/administration/version_control_systems_integration/vcs_integration_features/vcs_operations_for_git#commit) section of VCS Operations for GIT
and to the community Q&A [Error VCS with GIT](https://community.denodo.com/answers/question/details?questionId=9060g000000XerBAAS&title=Error+while+creating+an+Environment+-+VCS+with+git).
Hope this helps!