:tabc[lose] command not working

Attempting to close the current editor tab using :tabc or :tabclose results in "Parse error" shown in the Command Margin.

To Reproduce Steps to reproduce the behavior:

1. Open multiple tabs in VS 2019 (Community)
2. Enter :tabc in one of the tabs

Expected behavior Tab closes.

Environment (please complete the following information):

• Visual Studio version: 2019 Community 16.7.4
• VsVim version: 2.8.0.0
• Programming Language: c#
• Check(Type 'x') any that are installed:
  • [ ] ReSharper
  • [ ] Visual Assist

encountered the same problem here. currently I simply use :q instead of :tabc

This seems like it could be a low hanging fruit ticket. Do either of you fancy tackling this?