KeeChallenge setup not Working on Windows 10

[Kilian122]

When i try to setup da Database with the Plugin i always get the Error secret does not math but the Key is 100% the right Key

[karol-gro]

According to official Yubikey instruction, it could be solved by checking Variable Length Challenge? checkbox during configuration
See: https://support.yubico.com/hc/en-us/articles/360013779759-Using-Your-YubiKey-with-KeePass