Hi @thnogueira, the previous stick_breaking transform is now the simplex transform in the same file name as you have in your post above. IIRC, we now have pymc.logprob.transforms.TransformRV and pymc.logprob.transforms.IntervalTransform in lieu of what the two other errors that you have indicated.
Without more knowledge on how the code you are trying to port is using these lines, these are the primary pointers that I can give you for now. I hope that this helps and will be enough for a quick fix. If not and if you want to share a bit more of your code, you’re welcome to do so and I can try to get back to you when I have time for a quick look.