As yours is the only report of this particular problem it must be something in your own setup. Normally I would suggest a re-install but you have already done that, and also to check the language files, as some reported issues which went away when the changed to English in Joomla & VM.
You probably need to rule out issues with using that subdomain, which I would do by making an Akeeba backup and testing it on another server or on localhost.