I have frontend app wrote in Angular on localhost:4200 and backend in C#, .NET Core on localhost:5001. I had problem with 404 errors and solution is below. It is resolving my two problems, one to gets data from my controllers and second to repair auth functionality. GET http://localhost:4200/_configuration/* 404 (Not Found)e.g.:GET http://localhost:4200/_configuration/crypto-web-app 404 (Not Found)Continue reading “Angular Auth 404 (Not Found)”