IPeng 9.3 not connecting to server

I have been using iPeng 9.3 to control my Transporter. I have iPeng 9.3 installed on both my iPhone 7 Plus and also my wife's iPhone 7 Plus.
I was using it earlier today successfully. But this evening when loading iPeng on MY iPhone it says No Player Found. I have tried uninstalling iPeng 9.3 and then reinstalling it from the App Store. But it keeps saying No Player Found. It cannot connect to my Transporter.

I've just checked my wife's iPhone and iPeng is not working on her iPhone either. Same problem.

Should iPeng auto detect my Transporter? My iPhone is on the same wifi network as my Transporter. We only have the one wifi network anyway.

I am running LMS server software version 7.9 using the latest build dated 12 July. I also tried reinstalling the latest 7.9 build to see if that made any difference and it didn't.

Any ideas would be appreciated