You need to have access to the Time & Expense features to be able to enter and export time entries in the Time Card screen. Please check with your Sales Account Manager to purchase the required subscriptions.
Besides having the right BQE CORE subscription, you also need to have the right security profile and permissions assigned to be able to do so. It seems you do not have the security permission to export data to CSV from this screen. Please contact your CORE administrator to fix this.