bootstrap.min.js:7 Uncaught Error: Bootstrap tooltips require Tether (http://github.hubspot.com/tether/)

I know this was asked a long while ago, but just in case anyone else find this message about Tether in the future.

Tether is a library, the development of which, as of today has been discontinued. It was used for Bootstrap for the tooltips. However, if you simply remove the line where you call bootstrap.min.js, the error message requesting for Tether (i.e.: because it's BS's dependency) should disappear. Be cautious and check that nothing of what you have relies on those two to work though, though, although apparently tooltips was mainly their only purpose.

Removing the bootstrap.min.js should not have big effects on this project as it's a simple page intended to learn authentication stuff.

Regarding Bootstrap, they've already released (recently) their 4 beta. However, again, for this project it's better not to use that bootstrap minified script since now they use Popper, the alternative to Tether, and you'll find the same error message with a different name. :)

Yeah I am having the same problem as well. I have yet to figure out the answer. If the instructors are seeing this could they please provide an answer please?

I ran into this issue too, and I figured out what I missed. Check and make sure you did not forget to add these lines to your app.js file:

var mongoose = require('mongoose');

//mongodb comnection mongoose.connect("mongodb://localhost:27017/bookworm");

In my case, when encountering the issue. The browser seemed like it was hanging. After checking the log, sometimes I would see the bootstrap.min.js.7 error. After going back and reviewing the video. I realized I missed adding those lines. Go figure. Everything had worked fine until I tried to submit the form. After adding the above lines of code to my app.js file. Everything worked!