Workspace install halts on admin/modules - Route "entity.workspace.collection" does not exist

@SocialNicheGuru, are you installing Workspaces alongside other modules or just by itself? That route is declared in workspaces.routing.yml just like any others, there's nothing special about it, so I think this needs to be debugged locally to see which code is trying to load it before the router is rebuilt.

I just bumped into this problem as well, and it happened because there was a PHP syntax error in another module that was extending a class from Workspaces. So while this can happen, there's nothing we can do to prevent it in Workspaces itself, therefore closing this issue.