I get the following error when I attempt to access Optik TV on multiple computers: This site can't be reached oauth.tv.telus.net took too long to respond. I have also not been able to authenticate when trying to log on to Sportsnet as a television subscriber.
I can access the various channel apps just fine from my iPhone. Login comes up on all of them and I am able to sign in. watchoptik.telus.com also lets me log in successfully using Firefox on my desktop.
I often have the same issue. I have called support with no real resolution. The standard advice is to clear the browser cache & restart the browser. I find it works only about half the time. Instead I now simply try different browsers (IE, Chrome, Edge). One of them always works and if I go back to the one that I started with in a day or 2 it works again. Go figure...
My hope is that when they (hopefully) come out with a non-flash alternative it will be a much more reliable and better solution (more like the Shaw all, allows for better remote access/use, rewind, skip, volume control....).