How to fix Fatal error when the site disable MSI

QUESTION: 

I use the module Magento 2 Simple Details on Grouped Product version 1.0.7 for my site Magento 2.3.4.

We don't have a need on MSI so that I disable MSI for the site. Then, we got Fatal Error as below:

Do you have a fix for this?

ANSWER: 

To resolve this issue, please edit files as below:

+ app/code/Bss/SimpleDetailGroupedProduct/Block/SimpleDetail.php

+ app/code/Bss/SimpleDetailGroupedProduct/view/frontend/templates/catalog/product/view/type/grouped.phtml 

Or download the attached files below and overwrite the current file on your site.

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