I have forwarded your message to our hostmaster, who is usually pretty responsive. I’ll let you know what he says.
I’m not having similar trouble with any other plugins, and FWIW the site just automatically updated to the latest WordPress version.
I noticed when I logged in this time and went to the plugins page that there was a noticeable pause for ROT13 and Slim Plus before they separately displayed the new error message and the rest of the page displayed.
In any event, Connections and the Slim Plus template appear to be working properly on the front end.