Installed dev tools.
Cloned Default with no problems.
Activated Bootstrap5 then went to:
System>DevTools>Clone Template>Template Mgr
The Bootstrap5 doesn't have clone option
Clicked Edit, no clone option
Clicked Settings, no clone option
Template drop down doesn't list BS5 as a choice to clone
I have AC v1.3.4
I uploaded Dev Tool folder to public_html/extensions
installed via Extensions All
Activated the extension.