At the exact time on this incident, YouTube had pushed a change which disabled FBK's YouTube chat integration. Features which rely on this are no longer functioning at this time. The library FBK was using for chat was very reliable but was archived 4 years ago and will not be updated.
I have unfortunately discovered this at the very end of my weekend here, so I do not know how long it will take to look into this. If this is a simple change I can adapt it to myself, then I may be able to address it during the week but otherwise I will need to evaluate the viability for another method of scraping YouTube chat.