Steven Zahm@ Cliff
Sorry to hear you had trouble updating!
A tip, if this should occur in the future, as the results of any plugin update, including Connections, do this instead:
WordPress 4.9.1 was release nearly 1.5yrs ago… I very highly recommend upgrading to at least 4.9.8 as there were several very important/critical security updates included in those updates.
Back to the issue you experienced…
In what order did you upgrade? Did you upgrade Connections first and then the addons? Or, are you running and older version of Connections and then tried to update the addons? If it was the latter, the issue you experienced could occur as I do not test or support past versions of Connections, only the latest. So, addons only support the latest version of Connections.
I hope this helps, let me know.