start jboss tools in PDE and earlyaccess will pop up with error dialog that it had an error because it could not install things (which is expected when running in PDE)
start jboss tools without network access and I sometime see it pop up - can't reprouce that consistently.

but in short - seems like earlyaccess continues to want to tell users that something is wrong with early access even when it is not enabled but nor should it even if enabled. Show such error on the earlyaccess page rather than a blocking dialog.