When opening Cabos, a window opens saying "Java software cannot be loaded"

[Lord of the Rings]

It's occurred to me the issue might be with the version of Java you are using & the version of Cabos you are using. Are you using the most recent Cabos version & most recent java version? There may be a listing in one of the preferences or support files that lists which Java versions Cabos will load with. This might need to be changed. This was an issue that occurred with one of the LimeWire versions. The fix was reasonably simple in that scenario.

You said Cabos was working fine until a few days ago, did you update your Java around that time or between that occasion & previous occasion of using Cabos?