fix(frontend): prevent error when inputRef is undefined (#7649)

Author: afsuyadi

frontend/web/components/pages/CreateOrganisationPage.tsx

@@ -66,7 +66,7 @@ const CreateOrganisationPage: React.FC = () => {
   useEffect(() => {
     API.trackPage(Constants.pages.CREATE_ORGANISATION)
     focusTimeout.current = setTimeout(() => {
-      inputRef.current?.focus()
+      inputRef.current?.focus?.()
       focusTimeout.current = null
     }, 500)