diff --git a/src/main/java/com/redhat/devtools/lsp4ij/settings/ui/LanguageServerPanel.java b/src/main/java/com/redhat/devtools/lsp4ij/settings/ui/LanguageServerPanel.java
index b52d5bdc4..a273e24ea 100644
--- a/src/main/java/com/redhat/devtools/lsp4ij/settings/ui/LanguageServerPanel.java
+++ b/src/main/java/com/redhat/devtools/lsp4ij/settings/ui/LanguageServerPanel.java
@@ -356,6 +356,8 @@ public ComboBox<ErrorReportingKind> getErrorReportingKindCombo() {
 
     @Override
     public void dispose() {
-        getConfiguration().resetJsonSchema();
+        if (configurationWidget != null) {
+            configurationWidget.resetJsonSchema();
+        }
     }
 }