Please see Nightbot Troubleshooting, if it still doesn’t work let us know the steps you tried and if you’ve noticed anything.
Also, please note that Twitch Affiliate and Partner TOS forbids simultaneous broadcasting:
What do you mean by exclusivity for “Live Twitch Content”?
If the stream is embedded in another website in accordance with our Developer Services Agreement, this still counts as being on “Twitch” and is not a violation of this policy.
The exclusivity clause does not otherwise restrict Affiliates from using other streaming platforms to do live streaming. For instance, an Affiliate is permitted to start a stream on Twitch and, after ending that stream, immediately start a new, separate stream on another platform – assuming the Affiliate is not also using Twitch to broadcast that same content at the same time.
Lastly, it’s worth bearing in mind that Affiliates’ exclusivity obligations impact only live content, not past streamed content or VOD. Affiliates can upload the same VOD to Twitch and other platforms without any exclusivity concerns, with the exception, again, of archiving live content within twenty-four hours after it broadcasts on Twitch. Also, remember that broadcasting prerecorded live content on Twitch is considered real-time streaming of “live content” when it is broadcast for the first time.