When I test my code with a BIM360 project, I am able to get the BIM360 folder contents:
https://developer.api.autodesk.com/data/v1/projects/b.39cc5e50-e634-44ab-905b-0a2fab5299c9/folders/urn:adsk.wipprod:fs.folder:co.dNkJp3jzSSKOACX4DCgx3A/contents,
However, when I test with an ACC project, I get a 400 project id incorrect error.
https://developer.api.autodesk.com/data/v1/projects/4e97ffae-b501-4ebd-8747-98206589e716/folders/urn:adsk.wipprod:fs.folder:co.szzRe5O9Q12iXBKOtKlmZA/contents,
How is the project id incorrect?
{"code":400,"message":"400 Bad Request","body":"{\"jsonapi\":{\"version\":\"1.0\"},\"errors\":[{\"id\":\"a000cfdf-008e-4095-87ae-46f6adb1e9a4\",\"status\":\"400\",\"code\":\"BAD_INPUT\",\"detail\":\"Invalid project id.\"}]}","headers":{"server":"nginx","date":"Wed, 24 Sep 2025 15:51:00 GMT","content_type":"application/vnd.api+json","content_length":"151","connection":"keep-alive","x_request_id":"686ada52-a78f-4867-82af-610c4679a8bf","strict_transport_security":"max-age=31536000; includeSubDomains; preload","x_frame_options":"SAMEORIGIN"}} at line: 5831