Buddypress，“$ bp-> current_component”返回空字符串

I'm new to buddypress. I've just referred 'John James Jacoby' to create a custom page dynamically without going into the admin panel.

I can get the current component name in default buddypress pages using the below code:

global $bp;
var_dump($bp->current_action);

But the problem I face here is that when I try create a new page as mentioned in the 'John James Jacoby', I get 404 error. I can't figure out what is going on. Any help would be appreciated.

Thanks in Advance..