The admin panel turns white when in TTS plugin configuration ( see screenshot ) was fixed a while ago I think but now has returned.
Thanks for your feedback. Appreciate that.
css library was causing this problem, actually the problem is same but now different styling class was causing the problem.
We will be fixing this ASAP.
By the way, we also reviewed your comment issue related with JQL functions. We will soon answer that as well.
Fixed with 6.15.1 version