Debbie — Thank you for checking out our plugin.
I suspect you might only be seeing the admin view of the plugin. It does not look any different than the regular WordPress view of tags for admins or editors.
What is affected are the Author and Contributor views. Those are the users that are restricted and their post pages contain tag boxes that look like the screenshot.
You must have a user level that can edit tags. As such, you should not remove the capability from the Admin user.
If you want to modify the capabilities on the Editor level, you can install the Capability Manager plugin and remove the “manage_categories” capability from the Editor. If you remove it from the Admin, you won’t be able to manage any tags at all on your site.