Modification of the site on modx

1. Analyze the site, check the correctness of the API settings, identify the necessary improvements and estimate their cost
2. At the moment, there are again problems with orders. The developers of the site refer to the fulfillment system, fulfillment claims that the problem is refresh_token. It is necessary to understand this issue and "fix"
3. Create 404th
5. Assess the task of implementing a full-fledged API exchange with the ability to choose delivery on the site (I will send you the TK upon the fact of interest in working with us).