Hello, I'm trying to create a flow in Power Automate with Send an HTTP request to Sharepoint where I have full permissions on this site

When testing the flow I am receiving the following error

{
"statusCode": 403,
"headers": {
"Cache-Control": "no-store, no-cache",
"Pragma": "no-cache",
"Set-Cookie": "ARRAffinity=bcbcd66544f5ddaf4cbead4141062b9ca9d605ee7d3a04c1;Path=/;HttpOnly;Secure;Domain=sharepointonline-eus.azconn-eus-003.p.azurewebsites.net,ARRAffinitySameSite=bcbcd66544f59ca9d605e7d3a04c141d9e19b964fb41;Path=/;HttpOnly;SameSite=None;Secure;Domain=sharepointonline-eus.azconn-eus-003.p.azurewebsites.net",
"Strict-Transport-Security": "max-age=31536000; includeSubDomains",
"x-ms-request-id": "a2df06a1-20ec-4000-e994-",
"X-Content-Type-Options": "nosniff",
"X-Frame-Options": "DENY",
"Timing-Allow-Origin": "*",
"x-ms-apihub-cached-response": "true",
"x-ms-apihub-obo": "false",
"Date": "Tue, 30 Jan 2024 19:16:39 GMT",
"Content-Length": "352",
"Content-Type": "application/json",
"Expires": "-1"
},
"body": {
"status": 403,
"message": "GeneralSecurityAccessDenied\r\nclientRequestId: 284c343e-6bd7-4b31-d258ab5ff555\r\nserviceRequestId: a2df06a1-20ec-4000-e994",
"errors": [
"20010",
"Microsoft.ProjectServer.PJClientCallableException"
]
}
}
What could be happening?
Thanks