Hi friend,
Thanks for your feedback and sorry for my delay reply.
Refer to your information, you want to publish your project to Azure App Service Linux plan, please make sure you select "App Service Linux" on Pick a publish target page.
In addition, you could have a try with the following steps:
#1. Close all Visual Studio instances;
#2. Please delate %LocalAppData%\.IdentityService folder and restart VS2019.
#3. Before publishing, please build your project by using Build ->
Build Solution.
If above doesn't work, I suggest you update your VS2019 to the version 16.5.
Hope all above will help you.
Sincerely,
Anna
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