Hi Danny,
I'm Sumit, here to answer your query at the Microsoft Community.
I think Chromium Builds no longer supports MacOS HIgh sierra.
Please go through the following thread - it might help you disable autoupdates.
I also see MacOS ver 116 has been removed from the site, apologies for the experience :(
https://answers.microsoft.com/en-us/microsofted...
Hope that helps, and rely on us for any further inquiries. All the best.