Snippets Menu did't appear

[showteeth]

After checking "Snippets Menu" in Configurable nbextensions, Snippets did't appear as expected, then I checked out "JavaScript console", found a red line :".html(menu_item_spec.name)---Uncaught (in promise) TypeError: Cannot read property 'name' of undefined" at main.js(line 181) , while I don’t know much about JS, could you please help with it?
Thanks!

[moble]

I'm sorry, but I doubt that I can help — especially without more details. I just tried from a brand-new conda installation in a brand-new user folder on my computer, and it worked perfectly. Did you refresh your page? How did you install it? How did you install the rest of your jupyter-notebook installation? What are the various versions of everything you're using?

[showteeth]

I am sorry! I have refreshed page several times, and I installed "Snippets Menu" with jupyter_contrib_nbextensions and I get the rest of jupyter-notebook extensions installed smoothly with jupyter_contrib_nbextensions. jupyter notebook --version : 5.7.4 , conda --version : 4.6.7 and Chrome --version : 72.0.3626.96.
Thanks!

[moble]

Those are almost identical to my versions of everything (my Chrome is 72.0.3626.119). I guess you must have modified the menus somehow, and forgotten to put a name in one of the sub-menus. Did you alter the JSON string in the "Nbextensions configuration" panel? Do you have something about this in your custom.js file? Did you read the README?