There are so many variables that could cause a problem, it could be a computer problem, a program problem, user error to name a few. You have to give the developer something to work with. He already asked for a package of the sequence and possible a video of the error happening. They need to know EXACTLY what you did to cause the problem. Like how was the model built, what effect was on the model that you were modifying, what was your layer blending, any sub buffers, and on and on. If you give them the packaged sequence and a detailed explanation of how you made the program crash, then they will get it fixed. Include something like what model you were modifying the brightness, what effect and what point in the timeline just to start. If you don't include enough information for them to find the error, they are not going to guess and your problem isn't going to get looked at.
BTW, do you have your lights dimmed globally to begin with? If not changing the brightness to higher than 100 will probably change colors and not increase brightness.
