SPFx Web part working in Workbench not in Web part page

Hello,

 

I am working with the SPFx solution with the React. I have hosted my sharepoint hosted app into the Site collection which saves the file into the document library. I want to retrieve the information from the file which is saved using the SharePoint Hosted App. When i am working with the workbench, it returns me the required records, but when i upload the package into the App Catalog and add the web part into the page, it shows me 403 error. 

 

I am doing the process as a Global Admin.

 

 Please help me to solve the issue.