I just downloaded the latest AIDA64 trial to see if it can work as a replacement for different software, started setting up RemoteSensor LCD and ran into the same issue - I can read all sensors and modify the layout just fine, but the moment I try connecting to it (even by just opening localhost:port in my browser) the program crashes with no error message. Sometimes it will connect and keep working for a while, until I make any changes to the layout, which will make the browser refresh and crash AIDA
Edit:
I believe I've fixed it, or at least mitigated the issue. While trying to fix slow sensor reads I've done a Sensor Profiling Dump, which showed that my Corsair HX1500i PSU takes over 12 seconds to update sometimes, which I think was causing some sort of timeout and crash. Disabling HXi support under Stability seems to have fixed the connection issue for the most part