TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Node.get (/app/src/engine40/serverSideEngine.js:134:40)
    at W (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:28436)
    at I (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:32977)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:31513)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:125382)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:137941
    at onReady (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:144668)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:137851
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:130815