JavaScript and CSS CDN's don't work

I’m making a todo-list app with vue-js, axios, and bulma, and I was using three cdn’s to link the libraries to my project. For some reason, the cdn’s stopped working and now my project isn’t working properly. Could someone show me what’s wrong with my project?

Thanks for any future help!

Apparently the problem was with my cdn’s. I replaced the cdnjs link with one from unpkg and now my project is working. Still a little strange because the cdnjs link still is still valid with the js when I open it up.