TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Node.get (/app/src/engine40/serverSideEngine.js:136:40)
    at W (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:28475)
    at I (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:33186)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:31722)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:126197)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:138883
    at onReady (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:145587)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:138793
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:131630