Ignition 8.1 install issues

I'm trying to install Ignition 8.1.28, and the install seems to run OK, but after I download the Designer Launcher and try to launch a designer, I get this error:

The first time I tried launching it, it also had something about problems installing OpenJDK, but unfortunately I can't replicate that issue to get a snippet.
Any ideas?

Is there a procedure for completely removing everything related to Ignition to start over from scratch?
Thanks!

Hi all,
Still trying to test out Ignition, but I'm unable to get the designer to launch.
I just uninstalled EVERYTHING and started from scratch but I'm still getting this error:

Any help would be much appreciated!! ignition81 troubleshooting designer support @Support

This forum is not support. You should contact support to have them look over your shoulder.