Getting NaNs in Power Transform inverse transformation

Question

When I perform the inverse transform operation, I get some NaN values back.

Steps I took:

1. Power transformed each feature column and saved it in a dictionary:

{col1: transformer,
col2: transformer2,
...,
yCol: transformerY
}

2. After training the model and getting its predictions, I apply the inverse transform from transformerY and receive some NaNs. Why is this happening and how do I mitigate this?

Thanks!