_base.py:251: FutureWarning: Support for multi-dimensional indexing - WHAT?
I also encountered this problem when using Python's matplotlib.pyplot library, where I converted the input data from the plot() function to numpy Array, such a warning is not availabled, just for reference.
I have a project with a couple thousand lines of code.
I'm getting this message when it runs:

(e.g. obj[:, None]) is deprecated and will be removed in a future version.  Convert to a numpy array before indexing instead.   y = y[:, np.newaxis]

The error message doesn't give me any line number to go look at and I have no idea what to look for to try to debug this.
Any suggestions would be appreciated.