diff --git a/interface/resources/qml/+webengine/QmlWebWindowView.qml b/interface/resources/qml/+webengine/QmlWebWindowView.qml
index d2f1820e9a..c2ac92a1a7 100644
--- a/interface/resources/qml/+webengine/QmlWebWindowView.qml
+++ b/interface/resources/qml/+webengine/QmlWebWindowView.qml
@@ -40,7 +40,7 @@ Controls.WebView {
     userScripts: [ createGlobalEventBridge, raiseAndLowerKeyboard, userScript ]
 
     function onWebEventReceived(event) {
-        if (event.slice(0, 17) === "CLARA.IO DOWNLOAD") {
+        if (typeof event === 'string' && event.slice(0, 17) === "CLARA.IO DOWNLOAD") {
             ApplicationInterface.addAssetToWorldFromURL(event.slice(18));
         }
     }
diff --git a/interface/resources/qml/hifi/tablet/TabletRoot.qml b/interface/resources/qml/hifi/tablet/TabletRoot.qml
index 6001497743..be8a0cabe0 100644
--- a/interface/resources/qml/hifi/tablet/TabletRoot.qml
+++ b/interface/resources/qml/hifi/tablet/TabletRoot.qml
@@ -200,7 +200,7 @@ Rectangle {
         id: eventBridgeConnection
         target: eventBridge
         onWebEventReceived: {
-            if (message.slice(0, 17) === "CLARA.IO DOWNLOAD") {
+            if (typeof message === 'string' && message.slice(0, 17) === "CLARA.IO DOWNLOAD") {
                 ApplicationInterface.addAssetToWorldFromURL(message.slice(18));
             }
         }
diff --git a/interface/resources/qml/hifi/tablet/WindowRoot.qml b/interface/resources/qml/hifi/tablet/WindowRoot.qml
index ef2df5e218..05107699e0 100644
--- a/interface/resources/qml/hifi/tablet/WindowRoot.qml
+++ b/interface/resources/qml/hifi/tablet/WindowRoot.qml
@@ -118,7 +118,7 @@ Windows.ScrollingWindow {
         id: eventBridgeConnection
         target: eventBridge
         onWebEventReceived: {
-            if (message.slice(0, 17) === "CLARA.IO DOWNLOAD") {
+            if (typeof message === 'string' && message.slice(0, 17) === "CLARA.IO DOWNLOAD") {
                 ApplicationInterface.addAssetToWorldFromURL(message.slice(18));
             }
         }