Creating a customized workflow for approval handling, i.e. If you are using the basic user decision in the workflow.
There is a possibility you might come across the following error while you try to approve or reject from fiori Launchpad.
In Such a situation,
the only and a easy possible solution is to change the basic user decision in the workflow with
activity created from the copy of standard task TS12300097.
Bind the same with the work Item ID.
The Status will be updated in the &_WI_OBJECT_ID.STATUS&.
Three status are available : Approved, Rejected and Sent.
Using a simple Condition in workflow to identify the decision.
The Problem can be solved 😆 .