diff --git a/landing/siwe.react.js b/landing/siwe.react.js
--- a/landing/siwe.react.js
+++ b/landing/siwe.react.js
@@ -94,7 +94,7 @@
   const hasNonce = siweNonce !== null && siweNonce !== undefined;
   React.useEffect(() => {
     if (hasNonce) {
-      openConnectModal();
+      openConnectModal && openConnectModal();
     }
   }, [hasNonce, openConnectModal]);