I am the author of the module and this works without issue on my own TB site.
I suspect you have tried installing the github zip file that is not packaged as a module and hence will not work. The TB marketplace is supposed to automatically create the module based on the github code but it stopped working. I raised this many months back but nobody is taking care of it.
Try installing the attached module zip.
P.S.: I am a merchant and not really a developer, so expect limited support.