<t>As the warning message, your repository seems has no web project.<br/>
So you should deselect the Publish Web Projects option in .NET Core publish task, and specify your .csproj in project(s) option.<br/>
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And you can also find the hint message for Publish Web Projects option as below:<br/>
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If true, the task will try to find the web projects in the repository<br/>
and run the publish command on them. Web projects are identified by<br/>
presence of either a web.config file or wwwroot folder in the<br/>
directory.</t>
