I've implemented this plugin on many sites, but I've had clients come to me in the past week with broken Twitter. They all ceased updating over a week ago. I've gone through the usual checks: deactivating plugins, deactivating themes, uninstalling, reinstalling, clearing update locks, authorising and reauthorizing APIs, and then completely deleting API and re-creating them. There is no reason why they should be broken.
Please could you help? Send me a note and I will give you temp access to wp.