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:1:28484)
    at I (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:33195)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:31731)
    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)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:138805
    at /app/dist/lib/crawl2/dist/sandboxEngine3.9.js:1:131642