Hi, today we'll discuss the main issue that most of the users faced when integrating their TCS courier with Asaan Retail, and that's the connection failed issue. If you're facing these kinds of issues, don't worry, we have explained below on how to resolve this: 
Here are the steps that you have to follow in order to resolve this issue:
1) Most probably this happened because the user hasn't subscribed to the APIs that they have created on their
https://developer.tcscourier.com/login portal.
2) By clicking on the "view subscription" button, you'll get the details regarding the subscription.
3) Next, after reviewing the details of the subscription, You have to subscribe to the package in order to activate your API.
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