TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Node.get (/app/src/engine40/serverSideEngine.js:134:40)
    at root.__proto__.hasAttribute (/app/src/engine40/serverSideEngine.js:146:33)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:50900
    at m (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:49503)
    at Object.mapSegments (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:50821)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:31401)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:126207)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:138893
    at onReady (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:145597)</anonymous>