I've tried testing out the new Sales Documents feature but it hangs up at the very beginning. It asks me to Log In. When I click the button it opens a new window and I enter in my information.  Then it says "One moment please" then that popup goes away and I'm back to the screen asking me to Log In.

I normally use Mozilla so I tried it on Chrome as well with the same result.

I use many different Google logins. I don't know if that makes a difference somehow.  But I tried it with only the Pipedrive site open, to make sure I wasn't automatically logged in as a different account. Same result.