Im still not completely sure I'm clear on what you are (trying to) do. I migrated to remote MySql ages ago. If you are trying to incorporate a shared/network database for multiple Kodi instances I would HIGHLY encourage you to setup MYSQL, its easier to maintain and far better performing. The KODI wiki pages clearly show how to accomplish that.
But I loaded the plugin and notice it seems to assume, the databases for a local instance. Are you sure the NTFS/Share permissions are correct on the share for the user running VC?
May want to try to move the databases to a different folder like c\temp\
That seems like an odd UNC path.
This is purely conjecture from the screengrabs but
it looks like admin share but there is no c$
unless you really created a share called 'users', and if so the folder is under the user folder for the 'kodi' user which I imagine is not an administrator, and likely not the user VC is running under,