I had to re-install VSCode on my machine after an issue I was having, and after having done so, I can no longer run my Spring application. There is no error code, thrown, I can’t find it in the VSCode logs, and the dialog isn’t even copyable.
This is the error dialog displayed: 
'void org.eclipse.jdi.internal.connect.ConnectorImpl$StringArgumentImpl.<init>(org.eclipse.jdi.i... java.lang.String,java.lang.String, java.lang.String, boolean)'
The launch.json configuration was auto-generated by Spring Initializr, and previously worked. No changes have been made to my JDK or my pom.xml.
I also created a new test app and it had the same problem, so it’s not limited to this app or workspace.
Any ideas of what is going on here? (I tried googling the… error… but got not anything helpful)
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Answer
Going to go ahead and answer this, as I’ve fixed it.
I had the latest versions of both VSCode and the Java Debugger extension (I had just re-installed them both).
I wound up re-installing Windows entirely (spring cleaning), and now it’s working again.