My app has stopped working suddenly for existing shopify stores . When a user clicks on my app in their dashboard my app loads, but some error occurred comes up and then white screen loads. On debugging I found that the call to my apps /graphql endpoint is giving 403 error. Here is my server.js code for reference . One strange thing I noticed is that the app works fine upon reinstalling and on fresh installs . Can someone help me as to why the 403 could be coming.