Hello,
I can definitely fix the error message on the checkout page, I am an INDIVIDUAL freelancer so I can also start work at the same moment.
I am a full-stack Magento 1/2 developer having "Backend" skills like CUSTOM EXTENSION DEVELOPMENT, INTEGRATE EXISTING EXTENSIONS, MODIFY EXTENSIONS, etc. MY "frontend" skills are THEME INSTALLATION/CUSTOMIZATION from scratch, Responsive layout creation, etc.
Past work on Magento
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I am looking forward to having the discussion soon,
Best Regards,