Remote issues can’t connect

Hi everyone
I’m
Having issues with remote for Audirvāna 3.5 I can’t connect on iPhone or Android ???
Can someone suggest what to do ?? I check computer settings it all normal as before but I can’t connect I even disconnected firewall for few min to check but bit succeed

I know this sounds silly, but do you have more than one wifi? If so, you might want to check to see if the computer or the phone jumped to another network. It has happened to me before.