#1

When I try to see how to do authentification via this page:

Here
Here1154×985 220 KB

It leads me here:

Leads%20me%20here
Leads%20me%20here1300×1261 212 KB

I had to google it to find it.

#2

Thanks for reporting this, I’ve put it on our list to fix.

#3

Yes Similarly I have observed broken links in other pages too.

Capture

#4

Found in this link: Tweet object | Docs | Twitter Developer Platform