Product and version
FileMaker Pro Advanced 18.104.22.168
OS and version
OS X 10.11.6
MacBook Pro (Retina, 15-inch, Mid 2015)
I'm trying to display the browser-based version of Cisco Spark in a FileMaker web viewer. The web view seems to load properly — it displays the correct URL and the progress of the loading page — but no page is displayed. I have tested out the web viewer with another page (http://www.cisco.com) and I have pasted the Spark URL into a browser and both work as expected. I have also opened Spark in an iFrame (in Safari) so Spark can be opened in Frames. I have also turned on the debugger in FileMaker Pro Advanced but no error messages are displayed. FileMake will just not display this application in the FileMaker web viewer. Any ideas why not or how I can obtain more debugging info to understand what is going on?
How to replicate
This can be easily replicated by trying to open "http://web.ciscospark.com" in a web viewer.
There is no workaround.