Problem with Projects API and get projects

Hi,

I have a problem with rest api. I want to get projects calling api and this worked good weeks ago, but now it don’t work. If I use Postman, it work good and I get all projects, but when I use my vb.net code it say “Error in remote server: (403) Forbidden”

I tried with Authtoken and with oauth2 but the result is the same.

How can I fix it?

The code worked good weeks ago.

Best regards,