Error while creating the zip file to deploy onto Azure Functions

Hello,

I am currently trying to complete the tutorial and while trying to run the dotnet publish -c Release command it throws up an error saying the 'Microsoft.AspNetCore.Authentication.Abstractions.dll' cannot be found. I know this file exists because I can see it in the directory. I tried adding it into the .csproj file to see if it would help but it still gives me the same erorr. How would I go ahead and solve this error?

Thanks in advance!

PS: I have not changed any of the existing code