Issues with modified LinearRegression class

I am having two issues with the modified LinearRegression class you provided.

1. when I try it with my own data, it gives an error as below:
   
   Here's the data.head()
   

2) Second, with the provided data, I can extract the t-values with the following command but the structure of the array looks different from the one for p-values. Thus, it doesn't work when I try to add it to the output summary table.

reg_with_pvalues.t

Any help appreciated.