[Vuejs]-Quasar with Asp.NET Core WebApi IIS publish 403 error

There are many reasons for 403 error, you can try below methods to slove the question:

1.The 403 error page will appear if the right permissions are not given to the folder. you need to assign IIS_IUSRS security permissions to your assigned web folder.

Right click on the folder you assigned for web access in IIS, Choose "Properties" and then go to "Security" tab. In the top box, "Group or user names", open "Edit…", You will most likely cannot fine IIS_IUSRS in the list; open, "Add..", In the box at the very bottom, "Enter the object names to select (examples):" enter IIS_IUSRS, Click OK and make sure in the Permissions window, you have allowed, Read & execute, List folder contents and Read

2.Please check if you set the default document.