How can I handle this error uploadind my C# code?

[correoqatesting]

I´m having this trubble uploading my C# code:

Has anyone had this error?

Thank you very much for your cooperation in advance.

[Amit.Lacher]

Hi @correoqatesting please build your project using .NET core 3.1 and not 5.0
Let me know if that solved your issue.