DriveApp and GmailApp Services not working simultaneously in Google Apps Script

[Kuldeep Singh]

0

I'm encountering an issue with Google Apps Script when trying to use DriveApp and GmailApp together. Here's the situation:

1. When I call DriveApp alone, it accesses folders without any issues.
2. Similarly, when I call GmailApp alone, it works perfectly and retrieves emails as expected.
3. However, when I try to use both DriveApp and GmailApp in the same script, I get the
   following error: "Exception: Permission required to access."

Code.gs

function test () { let folder = DriveApp.getFolderById(FolderID); let threads = GmailApp.search('is:starred') let sheet = SpreadsheetApp.openById(sheetID) console.log({ folder : folder, threads : threads, sheet : sheet }) }

When these two services are called together in the same script, it throws the error.

error: "Exception: Authorization is required to perfom that action test @code.gs.2"

Troubleshooting steps I’ve tried:

• Checked the scopes in the project manifest file (appsscript.json) to ensure both Drive and Gmail APIs are included.
• Verified that I’ve authorized the script fully for both services by login in prompt window and allow permission.
• Tried separating the calls into different functions, but the issue persists when combined. What could be causing this, and how can I resolve it to use both services in the same script?
• I have tried to create new project and write out the code from scratch but no luck
• clear out cache memory login through different browser etc