There are equipment issues at the LROP feed site. There is no ETA when it will be back. No feed is guaranteed to be up 24/7/365. Most feeds are provided by volunteers and every effort is made to keep feeds up and running but they can go down at any time for reasons beyond the control of LiveATC.
Is there a way to contact the person responsible at the LROP feed site? Or at least try with someone else if it turns out that that person no longer wants to supply the equipment?
In these cases, i'm thinking that it would have been nice to have some sort of subscription based model where aviation enthusiasts like myself or others would pay the service, and in turn the volunteers for their contribution.