Zoho Projects API Scope for Issue Attachments

Zoho Projects API Scope for Issue Attachments

I try to download issue attachments via the API, unfortunately I always get the following error code when trying to download the file from the supplied URL:  {"ERROR_MESSAGE":"INVALID_OAUTHSCOPE","ERROR_CODE":401} 
indicating an auth scope error. I've tried various scope combinations, but so far nothing worked. The url I get from the attachmets looks like follows:
What is the correct oatch scope to add? This "ZohoProjects.portals.READ,ZohoProjects.projects.READ,ZohoProjects.bugs.READ,ZohoProjects.documents.READ,ZohoProjects.attachments.ALL,ZohoProjects.search.READ,WorkDrive.workspace.ALL,WorkDrive.files.ALL,WorkDrive.team.ALL,ZohoPC.files.ALL" doesn't work
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