The " " channel could not be run because it could not be reinstalled from the network.
The network status shows connected via Wireless with Good signal strength.
This happens for ALL the channels that are currently available for viewing on the ROKU !!!!
The Roku Stick 3500 is now a legacy device, and no longer supported. You can't buy a remote for them any longer, and as you have found many channels will no longer work on them. The 3500 was released in March 2014, so it's almost nine years old. It simply can't run what is currently offered, and unfortunately your only solution is a replacement.
Roku will often have offers for existing owners to upgrade to new models. You should see something labeled My Offers on the Roku home screen. I don't recommend the basic Express, but the Express 4K+, the latest Stick, or any other Roku player would be fine. If you desire a dual band WiFi player, you need to look at the Express 4K+, a Stick or Ultra. The basic Express and Premiere are single band WiFi devices.