TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Node.get (/app/src/engine40/serverSideEngine.js:134:40)
    at readMarkup (/app/dist/lib/crawl2/dist/sandboxEngine3.4.js:2363:18)
    at beforeNode (/app/dist/lib/crawl2/dist/sandboxEngine3.4.js:2676:26)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.4.js:2728:28)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.4.js:7843:21)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.4.js:8633:25
    at onReady (/app/dist/lib/crawl2/dist/sandboxEngine3.4.js:9135:5)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.4.js:8629:17
    at /app/dist/lib/crawl2/dist/sandboxEngine3.4.js:8195:17