You need to check at EasyPay and in eportal to ensure both software allow the probation employee to apply for leave. Please follow the steps below:
EasyPay
Go to the Leave module.
Click Setup, click Leave Type.
Select the Leave Type and click Suspend.
Ensure the setting is enabled as User Defined - Suspension start from hire date for "0" months.
Click Save.
ePortal
Log in to the ePortal as admin.
Click Settings, eLeave Settings, and select Configuration.
Select Full Leave Privilege Granted under the Allow leave application during probation.
Click Submit.