Same here. When logging into Sandbox lab i get "Login failed". and prompted for username / password. I enter again the username password from the email "Your Cisco DevNet Sandbox Lab is Ready and get "Login failed".
pls help.
!sudo /usr/sbin/openconnect devnetsandbox-us-sjc.cisco.com:20160 --user=haydn.davi --passwd-on-stdin
!<password redacted>
!POST https://devnetsandbox-us-sjc.cisco.com:20160/
!Connected to 128.107.93.228:20160
!SSL negotiation with devnetsandbox-us-sjc.cisco.com
!Connected to HTTPS on devnetsandbox-us-sjc.cisco.com
!XML POST enabled
!GROUP: [Anyconnect-pod60]:Anyconnect-pod60
!POST https://devnetsandbox-us-sjc.cisco.com:20160/
!XML POST enabled
!POST https://devnetsandbox-us-sjc.cisco.com:20160/
!Login failed.
!Username:haydn.davi
!Password:
!POST https://devnetsandbox-us-sjc.cisco.com:20160/
!Login failed.