«Unable to update run-time folder sharing status: There was an error mounting the Shared Folders file system inside the guest operating system.»

VMware
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A similar problem:

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I was able to resolve this issue by purging the open-vm-tools package within the guest OS (ubuntu server 16.04), and installing the proprietary vmware-tools that VMWare Fusion provides.

github.com/wplib/wplib-box/issues/98#issuecomment-229820096

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I have fixed the problem by removing open-vm-tools and installing VMware Tools instead:

I have removed open-vm-tools by the command:

sudo apt-get remove --purge open-vm-tools open-vm-tools-desktop