@Jumble FYI, getting crashes when loading Jumble today:
> Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.
Also reported here: 
GitHub
Failed · Issue #678 · CodyTseng/jumble
Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.