TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Node.get (/app/src/engine40/serverSideEngine.js:136:40)
    at root.__proto__.hasAttribute (/app/src/engine40/serverSideEngine.js:148:33)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:50909
    at m (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:49512)
    at Object.mapSegments (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:50830)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:31410)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:126209)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:138895
    at onReady (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:145602)