Issue:
I am using Magento 2 Configurable Product Matrix View ver 1.1.7 on M2.2.9.
When placing an order, I cannot checkout and got the error below
Fatal error: Uncaught Error: Call to a member function getItems() on null in /app/code/Bss/ConfigurableMatrixView/Observer/CheckoutSuccess.php:58
However, checking on the backend, I found the order was in the Order Grid.
Solution:
This issue happens due to the fact that our module is not compatible with Magento 2.2.x at this time.
To fix this issue and make the module work on Magento 2.2.x, we have edited the file app/code/Bss/ConfigurableMatrixView/Observer/CheckoutSuccess.php

Please check and move this fixed file on your site and then flush the cache.
If you need any further support, please feel free to contact us.
About us
BSS Commerce is a full-service ecommerce agency with 14+ years of experience, supporting 75,000+ customers worldwide. As an Adobe Commerce Solution Bronze Partner and Select Magento Extensions Builder, we deliver trusted end-to-end solutions.
Our core strength is Magento, with 150+ extensions designed to enhance store performance and drive growth. With deep expertise from years of working on Magento websites, we deliver scalable, high-impact solutions backed by strong client trust.
Discover our extensions: https://bsscommerce.com/magento-2-extensions.html
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