Sorry to hear about the update installation problem you are having! In my experience, it’s rare, but WordPress can mess up a plugin update. The good news is your data is safe. Here’s what you need to fix it.
Log on to your site with FTP.
Go to this folder:
In that folder you will see a
Delete that folder.
After that folder is deleted, go back to the Plugins admin page.
You will now be able to reinstall Connections and it’ll use the preexisting settings and data you’ve already entered.
Hope that helps. Let me know!