I suspect you installed a while ago some virtualbox-5.0 or virtualbox-5.1 from Oracle official website, and the script hasn't been deleted correctly because you never removed that package and installed the Ubuntu hwe one.
Please remove --purge it and install it again.
I suspect you installed a while ago some virtualbox-5.0 or virtualbox-5.1 from Oracle official website, and the script hasn't been deleted correctly because you never removed that package and installed the Ubuntu hwe one.
Please remove --purge it and install it again.