Libreoffice Calc 7.3.6.2 Share Document mode not working

Hi all,
I am attempting to share a document on a shared network drive here so that I can have users collaborate on editing it. I created a new spreadsheet, entitled ‘test.odt’ and click on

Tools > Share Spreadheet…

when I click the

Share this spreadsheet with other users

radio button, a dialog box pops up that says

This spreadsheet must be saved to activate sharing mode. Do you want to continue?

I click “Yes” but this does not seem to make any changes. When I again go to

Tools > Share Spreadheet…

The

Share this spreadsheet with other users

radio button is not clicked, and I am the exclusive user with access to the document. Why are these changes not taking effect?
If I create a copy on my local hard drive this issue is not happening. When I use FTP to save the document as a remote file or save it to a shared NAS drive this issue occurs. The only way I can share this document is if it resides on my hard drive.