Hi @KAUE_BREGOLA .
I’m not sure you have exactly the same problem - the others are related to custom taxonomies.
For the Postman test, the URL for the GET request needs to be https://<yoursite>/wp-json/wp/v2/users/me - you’ve stopped at wp-json.
The iwc-api-key needs to be a Header element in Postman, not tagged onto the end of the URL. Check the Headers tab in Postman and add that header with your API key as the value.
If you get a 403 error from Postman too, and if you’re 100% certain that you’ve copied the API key correctly from the Make plugin, then it’s most likely to be either a file permission or .htaccess file problem with your WordPress server.