ViewComponent tag helpers not working

I have an ASP.NET Core 5.0 Web Application. I faced same issue, but I resolved this issue.

For example:

If my project's name is MyProject and my view components located at Components folder, I added below code to _ViewImport.cshtml and it is working for me

 @addTagHelper *, MyProject  

For more details, you can see this video: Kudvenkat - ASP NET Core view component tag helper

In this case, problem was also with the parameter with default value. This issue us being tracked on github, but currently ViewComponents cannot have parameters with default values

This should work:

<vc:login-form model="null" />    

Old question, but had the same issue.

As per this link, it seems _ViewImports or _GlobalImports isn't automatically applied inside ViewComponents. Try adding the @addTagHelper line in the ViewComponent View.