Debugger entered--Lisp error: (void-function define-transient-command)

[hajovonta]

When loading the package after cloning the repo, I get this error message.
My Emacs and the packages are fairly recent, meaing at most 2 weeks old.
There is no define-transient-command in Emacs indeed. (transient is installed)

[18goldr]

I have the same issue.