Wrong type argument: commandp, treemacs-leftclick-action

[gygy]

Wrong type argument: commandp, treemacs-rightclick-menu Wrong type argument: commandp, treemacs-leftclick-action [5 times] Wrong type argument: commandp, treemacs-doubleclick-action Wrong type argument: commandp, treemacs-leftclick-action [3 times] Beginning of buffer [6 times] Wrong type argument: commandp, treemacs-leftclick-action [3 times] help-fns--analyze-function: Symbol’s function definition is void: treemacs-leftclick-action

[Alexander-Miller]

The function, and the entire mouse interface, is lazy-loaded. If it's undefined on your end it's most likely a faulty installation that lacks autoloads.