I get that error every time I try to use it. Have complained several times and opened a ticket once or twice and never found a solution. I just keep trying and after like 3-4 attempts it will connect.
I also get the error every time. I do run a P3, not a P4 however it stopped working about 12 months ago. Never managed to get it working. I just rely on the old "Webinterface" built into the P3 and use the app when connected on Wifi.
GHL don't seem to acknowledge there is an issue as "as it works fine for them"
So I changed my Profilux (3 ex) from Read/write to read only and it works. When I changed back to read/write it fails, back to read and it works and so on. Have you seen this before @Vinny@GHLUSA ?