The lack of a null check when calling the future (future.thenAccept line 288 handleRequest() in RemoteEndpoint.java ) has led to a null pointer exception. My project incorporates lsp4j through ...
java.lang.NullPointerException at org.eclipse.tm4e.ui.text.TMPresentationReconciler.setGrammar(TMPresentationReconciler.java:339) at org.eclipse.tm4e.samples ...