route.outlet is not a function

TypeError: route.outlet is not a function
    at Object.get children [as children] (/var/task/netlify/functions/index.js:18408:22)
    at /var/task/netlify/functions/index.js:15511:35
    at /var/task/netlify/functions/index.js:15473:49
    at createMemo (/var/task/netlify/functions/index.js:15394:10)
    at children (/var/task/netlify/functions/index.js:15473:16)
    at /var/task/netlify/functions/index.js:15511:14
    at createMemo (/var/task/netlify/functions/index.js:15394:10)
    at provider (/var/task/netlify/functions/index.js:15506:12)
    at createComponent (/var/task/netlify/functions/index.js:15571:15)
    at children (/var/task/netlify/functions/index.js:18405:26)