GET request with Basic Auth token using Angular 6 getting 404 but works fine on Postman

I'm trying to do a GET request on an external API. The api gave me a username and password which I encoded to get the Basic Token. When I test in on Postman everything works fine but when implementing it Angular 6 I get a 404 error, which is strange since I used the exact same URL in Postman. This is my code:

this.http.get('https://api.easypost.com/v2/shipments',{
headers:{
'Authorization':'Basic '+this.token
}
}
).subscribe((res:Response)=>{
console.log(res)
})


I don't understance why I'm getting a 404. The URL works fine in Postman. This is my networks tab:



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