I think you should accept @Sainaen ‘s comment as answer. I am just elaborating on that as no one else has done that till now. The reference is Disqus Bug Report
We checked with our team and these errors aren’t a result of any
problem so you can safely ignore them. However, were considering
hiding them so they don’t cause any annoyance. Thanks for reporting!
I verified and the errors are still coming however they do not effect the system’s working in any way whatsoever. This is more of an annoyance rather than an error. Still, it should be fixed because Disqus is too big an entity to ignore these silly warnings. What i would suggest is to mail to them the new stack trace along with any other details you think are important. even i would mail them and let’s hope it gets removed. If not, then turn a blind eye towards that. Hope it helps.