diff --git a/misc/dist/html/editor.html b/misc/dist/html/editor.html
index e5c68c63384..5959b7b6643 100644
--- a/misc/dist/html/editor.html
+++ b/misc/dist/html/editor.html
@@ -701,9 +701,14 @@ function startEditor(zip) {
 	editor = new Engine(editorConfig);
 
 	function displayFailureNotice(err) {
-		const msg = err.message || err;
-		console.error(msg);
-		setStatusNotice(msg);
+		console.error(err);
+		if (err instanceof Error) {
+			setStatusNotice(err.message);
+		} else if (typeof err === 'string') {
+			setStatusNotice(err);
+		} else {
+			setStatusNotice('An unknown error occured');
+		}
 		setStatusMode('notice');
 		initializing = false;
 	}
diff --git a/misc/dist/html/full-size.html b/misc/dist/html/full-size.html
index fc34164368a..1d76abe0a56 100644
--- a/misc/dist/html/full-size.html
+++ b/misc/dist/html/full-size.html
@@ -134,9 +134,14 @@ const engine = new Engine(GODOT_CONFIG);
 	}
 
 	function displayFailureNotice(err) {
-		const msg = err.message || err;
-		console.error(msg);
-		setStatusNotice(msg);
+		console.error(err);
+		if (err instanceof Error) {
+			setStatusNotice(err.message);
+		} else if (typeof err === 'string') {
+			setStatusNotice(err);
+		} else {
+			setStatusNotice('An unknown error occured');
+		}
 		setStatusMode('notice');
 		initializing = false;
 	}