I checked the direct links on the site for the save to calendar and its giving me an error page saying "File not found" or "Site can't be reached"
But here's something interesting to go along with this that maybe will shed a little light in some direction to look for in the future....
Over the past couple of weeks I have noticed that the RSS feed from the latest events module that my Mailchimp newsletter uses have not been showing the location information.
Note: it's only happening in my Florida directory of my site, all others are working perfect as they have been for the past couple years since I set it up.
This morning it came through fine
When I went into Mailchimp and checked the display on the template, it would show fine as well.
Over the past couple weeks I've also check the actual feed itself and tried to recreate it to error. Only once have I actually had it come back without the location information until this morning.
This morning (after the email came through ok) I checked the RSS feed and now it's not showing the location information again.
On top of the RSS, I also have had a page on the site that includes a latest events module that keeps intermittently giving me a white screen as well and the only way to clear it was to clear the site cache.
This morning it did it started doing it again.
So I cleared the cache and poof all gone, everything works again, including the save to iCal.
I then proceeded to compare all Jevents settings and plugins across all of the directories and found that
plugin_content_jevcreator : 3.0.1 and
plugin_jevents_jevusers : 3.4.3
were not activated on the other sites that were working properly, so I deactivated them on the Florida directory.
I also completed turned off JCH Optimize cleared the cache and tried creating the error, and it was working fine.
I then proceeded to start from the lowest setting on JCH and gradually advance the settings until I got back up to the highest settings I could.
It has yet to cause any of the errors and I've been constantly trying it for about 4 hours now.
I can't duplicate the error now... but is there anything you could think of that might be conflicting with cache to cause these 500 errors and not to display the location of an event?
Or cache and the two plugins I deactivated?