When Adding, It Shows an Error That the User Lacks Permissions, Even Though They Have Them
If you have multiple authorized users, the default access will be granted to the first authorized user. You can either grant the necessary viewing permissions to the required user or log out of all accounts and log in first with the desired account to make it the default account. More details - https://support.google.com/accounts/thread/3813256/how-do-i-change-my-default-account?hl=en