We have updated our production environment to patch the problem and verified that all versioning processes are working correctly. Apologies for any inconvenience while we attended to this issue. As a bonus, we added a new 'versioning notes' feature at the same time!
Posted Jan 17, 2019 - 13:45 AEST
Yesterday we made some slight updates for creators when publishing version updates of their topics. It appears those changes have inadvertantly created a small issue which prevents the publishing of version 1 of a topic. Updates to existing versions are working correctly. There are no impacts on accessing or exploring topics. We are investigate the issue and hope to release a fix today.