Sorry for the super late response, I got a new pc and it slipped my mind to log back into devforum.
Like Harley said, the main issue from being unable to archive a rendermesh is that archiving allows us to prevent the asset from being loaded into games after it’s been archived (which helps resolve the issue in the case that the mesh is stolen by malicious users and developers).
As for those who do have this issue, it seems that when you upload a mesh through asset manager instead, it does not upload as a rendermesh, thus allowing you to archive it. If you think you might need the ability to archive a mesh, you should upload your meshes via asset manager instead.