Are you getting the error “Jetpack: [auth_failed] Authorization header was malformed.” when using the Publicize feature to link your WordPress website. Here is the recommended procedure to fix and or troubleshoot the problem.
How to Fix: Jetpack [auth_failed] Authorization Error
Recently (I believe it’s been since the WP 4.0 upgrade), my Jetpack Publicize settings got deactivated and I had to ‘reauthorize my connections’. What I found is that after the WordPress 4.0 upgrade, you need to follow these steps to fix the Jetpack Authorization header was malformed error.
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WordPress.org
Get this error on the Publicize account page with every account after the update to 4.7.1. Deactivate/activate plugin doesn’t work. Viewing 4 replies – 1 through 4 (of 4 total) (Maybe) it’s gone after the reactivation after all. I’ll keep an eye on it.