diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index edce2023ff..6c7f4eb908 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -2094,12 +2094,12 @@ bool ScriptEditor::edit(const RES &p_resource, int p_line, int p_col, bool p_gra
 	// Don't open dominant script if using an external editor.
 	const bool use_external_editor =
 			EditorSettings::get_singleton()->get("text_editor/external/use_external_editor") ||
-			script->get_language()->overrides_external_editor();
+			(script.is_valid() && script->get_language()->overrides_external_editor());
 	const bool open_dominant = EditorSettings::get_singleton()->get("text_editor/files/open_dominant_script_on_scene_change");
 
 	const bool should_open = (open_dominant && !use_external_editor) || !EditorNode::get_singleton()->is_changing_scene();
 
-	if (script != nullptr && script->get_language()->overrides_external_editor()) {
+	if (script.is_valid() && script->get_language()->overrides_external_editor()) {
 		if (should_open) {
 			Error err = script->get_language()->open_in_external_editor(script, p_line >= 0 ? p_line : 0, p_col);
 			if (err != OK) {
@@ -3005,7 +3005,7 @@ void ScriptEditor::set_scene_root_script(Ref<Script> p_script) {
 	// Don't open dominant script if using an external editor.
 	const bool use_external_editor =
 			EditorSettings::get_singleton()->get("text_editor/external/use_external_editor") ||
-			p_script->get_language()->overrides_external_editor();
+			(p_script.is_valid() && p_script->get_language()->overrides_external_editor());
 	const bool open_dominant = EditorSettings::get_singleton()->get("text_editor/files/open_dominant_script_on_scene_change");
 
 	if (open_dominant && !use_external_editor && p_script.is_valid()) {