TypeError: toAdd.contains is not a function
    at virtuallyAddElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3874:40)
    at Tree.copyFromElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3927:17)
    at Object.replaceDOMTree (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:4342:14)
    at Object.replacer (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:5185:45)
    at processNodeWithEngine (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3129:42)
    at processNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3334:27)
    at afterNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2685:37)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2763:25)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:8744:21)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.5.js:9534:25