Twitter Sharing (through Jetpack) giving error

Good afternoon,

On my site,, the Publicize feature through Jetpack isn't working.

When I go to the "Sharing" settings, the Twitter authorization gives the message, "Jetpack: [auth_failed] Authorization header was malformed". When I try to remove it to reauthorize Twitter, it says it adds Twitter's auth rather than removing it. So confused.

Thanks so much in advance for your help!

Best regards,