WooCommerce & SAP Ariba Integration Fix

I am currently facing an issue with my WooCommerce and SAP Ariba (ERP) integration for the PunchOut Catalogue. The specific problem is that items do not appear in the cart when trying to add them. Despite the issue not being triggered by a specific event, it has persisted since the integration. There have only been minor tweaks made to the WooCommerce setup, so I am hoping this can be resolved quickly.

Ideal skills for this project include:
- Expertise in WooCommerce
- Proficient in SAP Ariba (ERP)
- Understanding of PunchOut Catalogue
- Problem-solving skills to troubleshoot the cart issue
- Ability to work with minor customizations in WooCommerce