TypeError: toAdd.contains is not a function
    at virtuallyAddElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3933:36)
    at Tree.copyFromElement (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3964:17)
    at Object.replaceDOMTree (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:4385:14)
    at Object.replacer (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:5239:45)
    at processNodeWithEngine (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3172:42)
    at processNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:3377:27)
    at afterNode (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2728:37)
    at domTraverse (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:2791:37)
    at translationReceived (/app/dist/lib/crawl2/dist/sandboxEngine3.5.js:8802:21)
    at /app/dist/lib/crawl2/dist/sandboxEngine3.5.js:9600:25