mythofechelon
mythofechelon
I tried using my username and an app password too but those credentials were rejected with error "Your username or password was invalid" too.
Nope, as you can see below: 
You can see in the GIF / video that the first installation attempt was by double clicking.
I just experienced this problem while updating from version 13.3.0 to version 13.4.0.
I just experienced this problem while updating from version 13.4.0 to version 13.5.0.
I just experienced this problem while installing version 13.6.1.
I just experienced this problem while installing version 14.0.1.
Yes, this would be very useful.
I'd like to see this too.
Using the CSRF token worked for me too.