Azure DevOps build Artifacts not getting generated in Net web app

I am building the application through Azure DevOps(VSTS) pipeline. This is the build pipeline parameters being used:

These are the Publish Artifact parameters:

Initially, I was using the "Copy file task" but then got to know that this task is used only in .net desktop-based applications and not in web-based apps so I have disabled this task. The default values being used for two variables are:

BuildConfiguration = release BuildPlatform = any CPU

After building the application, it shows build succeeded and a message as: "Directory 'D:\a\1\a' is empty. Nothing will be added to build 'Ca App artifact'".

May I know why I am not getting the artifacts?