Sonos - iOS dead - one backup solution

Woke up to a completely dead app this morning. Unsure what happened. Was fine and then I believe it updated. The web controller gave me exact same issue. If you have a similar situation / problem, luckily my desktop app I did not have it auto update and I am able to control my system using the windows desktop app. So if you need to use it today and have the same issue as me, then this is one possible solution to getting a bricked system return to function.