S3 (Credentials from AWS Security Token Service) profile broken

> **599871e** created the issue

Connexion to classical S3 works OK but using STS stopped working.

I am using MFA also.

When opening a bookmark that used to work, Multi-Factor Authentication opens as usual, but when correct code is entered, the pop up just closes and CyberDuck window just continues to show bookmarks as if nothing happened. 