First I would encourage you to edit your post and delete the System Report contents. The report is useful for me to diagnose problems, but it can sometimes contain sensitive information about your server configuration, so it’s not a good idea to post it publicly.
I tested your feed URL with the preview tool and it is working properly. So my best guess at this point is that your site has the empty calendar cached. Did you make the feed public after first testing the calendar and finding that nothing was loading? If that’s the case, then you’ll want to clear the ICS Calendar cache. Go to the ICS Calendar admin page and click the Clear Cached Calendar Data button. If you have any other caching plugins running, you’ll need to clear their caches too (but I don’t see any in the System Report).
Let me know if this does not resolve the issue. (And again, please delete the System Report above!)
