Hello @jessica ! Thank You for your question.
Unfortunately, this information is not enough to understand what is wrong with the App. Please, send us more information like where does the App stops and maybe attach a screenshot.
If you stream via Facebook, please read this: https://community.h7.org/topic/762/facebook-live-won-t-start
and this: https://community.h7.org/topic/761/live-stream-won-t-start
If via YouTube, then read this: https://community.h7.org/topic/758/livestream-doesn-t-start where we described what could be the problem of broadcasting on YouTube.
It may be helpful.
We don't have an option to select timeline to a live stream but we will add it to ideas for the next App version.
Thank You very much!