It is possible that your store is password protected or similar

So you would need to try the following: 

  • white-list "app.dragdropr.com" server IP address "136.144.128.56" so that it can communicate with the Magento store using rest API.
  • the rest API route needs to be working: "{magento1-url}/api/rest"
  • the m1 server should not strip "Authorization" header 

Reach us in case of any questions:)

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