TypeError: toAdd.contains is not a function
    at virtuallyAddElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3919:36)
    at Tree.copyFromElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3950:17)
    at Object.replaceDOMTree (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:4371:14)
    at Object.replacer (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:5225:45)
    at processNodeWithEngine (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3158:42)
    at processNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3363:27)
    at afterNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2714:37)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2777:37)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:8806:21)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.5.js:9604:25