Hi Riya,
Try this URL.
https ://sap/bc/ui5_ui5/ui2/ushell/shells/abap/FioriLaunchpad.html?sap-client=300&sap-language=EN#WorkflowTask-displayInbox&/detail/BQA_300_PGW/000012199710/TaskCollection(SAP__Origin='BQA_300_PGW',InstanceID='000012199710')
If it works, most probably My Inbox is not the latest or some note is missing.
Regards,
Masa / SAP Technology RIG