Comet KVM - No HDMI Signal Detected

OK I remember I had it working with my Supermicro server for a moment using a custom firmware from this post https://forum.gl-inet.com/t/no-hdmi-signal-detected/60129/14

Now when I try to load this firmware I get a message Verification Failed on every install attempt.
@minmie are you able to tell why I can’t install it now? You also mentioned the fix will be included in 1.4.x firmware but I am now on 1.5 and still does not work.

Can you make this firmware file available for me please? https://fw.gl-inet.com/kvm/rm1/test/glkvm-RM1-1.3.0-0625-1750840368.img?