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Expected 2D Array, got scalar array

Attempting this tutorial. 

https://www.quantconnect.com/tutorials/strategy-library/trading-with-wti-brent-spread

 it worked fine a couple days ago and now i get this error. i copied the code fresh from the page.

 

Runtime Error: ValueError : Expected 2D array, got scalar array instead:
array=46.1700.
Reshape your data either using array.reshape(-1, 1) if your data has a single feature or array.reshape(1, -1) if it contains a single sample.
at OnData in main.py:line 47
ValueError : Expected 2D array, got scalar array instead:
array=46.1700.
Reshape your data either using array.reshape(-1, 1) if your data has a single feature or array.reshape(1, -1) if it contains a single sample. (Open Stacktrace)

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