I've been trying to use UploadCollection with multiple: true. Before when it was false everything worked fine but since changing to true it started to give this error. I thought it was in uploadComplete but I commented the code inside and it still gave me this error.
I've checked and when using multiple: true while on the uploadComplete function they use the destroy call from ManagedObject-dbg.js which has the error. But with multiple: false we use the Element destroy() and they don't have this error.
So what should I do?