Signing error
In some cases signing errors occur when using a PKCS #11
provider key for authentication. If your PKCS #11 provider
(e.g. a hardware token) has multiple keys, it may be
that not all the keys can be used for authentication.
Try changing the Slots value in the PKCS #11
configuration (see section
PKCS 11 Provider).
When experimenting with the value, saving the settings and
restarting the application, you will see different keys being
used for authentication. Upload each key at a time to the
remote host computer. One of the keys may be valid for authentication.