Why is my transaction failing with "Technical fault, return_code=FAILreturnMsg=sub_mch_id与sub_appid不匹配" Error

This error occurs when the entity name used to register a WeChat MID is different from the entity name used to register the Miniprogram/In-app AppId. Please confirm the entity name you used to register miniprogram/app.

In case you need to create a new MID with the same entity name, please reach out our Support. 

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