I've been seeing this warning when accessing these forums on and off for a week or so:
The odd thing is that it only seems to happen with the Android version of Chrome, not on my Mac. It gives me the red screen trying to warn me away, requiring me to "Proceed Anyway" at great implied risk.
I'm sure it's a false positive, but I figure it bears mentioning anyway!
OculusVR *DOES* have a problem with their web server certificate when a browser inserts "www" on the of the URL (which often happens to me). It appears that their certificate was not issued with wildcard options for "http://www.developer.oculusvr.com", causing some browsers to complain when that URL is used.
However, in your case it should work after you update your certificate store on your device.