The registered device is a laptop. I am using Microsoft edge. It is NOT POSSIBLE to keep changing ''devices'' or browsers just to check whether this or that isn't stable - else you get locked out, as each ''change'' will count as a registration.
That aside, whilst watching - I'm also using a another computer for my hobbies.
Back to laptop. Usually the error will come up on all the selected programmes from the cut-down list of the t.v. package.
I can HOWEVER USE the same browser, to ITV, Channel 4, UKt.v. Channel 5 and of course BBC WITHOUT ISSUE, although I can't watch it on GO - this demonstrates that I have no browser issues, no connectivity issue. BBC always exits GO to the BBC iplayer. But the rest are\should be viewed on the GO platform. Sometimes I simply can't get anything. Sometimes I can watch constantly refreshing the browser when the error comes up, or absolutely nothing, except the error message.
This is always from home, rather than on THE GO - which is designed to do. So my internet connection is always constant.
Remember I am using a Laptop Win.10 - fully updated I say that because a lot has changed with regard to flash players and all sort of things.
It would not be normal on a laptop to require a App - other than a plugin to the browser.
So I did download this App at the time, whether it is new or old or whatever I really don't know other than it is listed as Version 1 in add and remove programmes, operates from the task bar icon - but just simply brings up the browser.
There at the point of the Browser operates, like any other online t.v. player. ie bbc, Itv, Channel 4 and 5 and UKplayer So that basically is how I actually get anything to watch, rather than the extras available from my Virgin t.v. package.
Generally ''GO'' is ad hoc sometimes about 20% I can watch a whole programme, 40% lucky to get it to the end and 40% it shows unavailable message across all programmes, but I can still see the programme listings.
Signing in on various browsers, trying different machines from experience has never changed anything and it COUNTS TOWARDS THE MONTHLY CHANGES and eventually you can lock yourself out.