Insufficient Privileges to perform this operation while trying to do get, create or list tickets

Insufficient Privileges to perform this operation while trying to do get, create or list tickets

Hi there, I'm trying the Zoho Desk API, already get the token, with scope=Desk.search.READ,Desk.tickets.ALL,Desk.basic.READ
but I haven't been successful trying to use the API, can you help me?

Attached is the screenshot for list all tickets.

Thanks!