Task Status should display as text instead of Integer

I have created a task report in that status column showing as 0,1 and 2 like that but i want to show that as a text like "Assigned", :Completed" like this.

Could you please help me on this? when i tried with below code. i am getting the error as  "Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!forEach [line 18]: Error in a!forEach() expression during iteration 7: Expression evaluation error at function a!forEach [line 32]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function 'index' parameter 2 [line 54]: Cannot add incompatible operands of type List of User or Group and type Number (Integer)."

load(
  local!pagingInfo: a!pagingInfo(
    startIndex: 1,
    batchSize: 5
  ),
  with(
    local!report: a!queryProcessAnalytics(
      report: cons!MY_TASKS_REPORT,
      query: a!query(
        pagingInfo: local!pagingInfo
      )
    ),
    a!gridField(
      label: local!report.name,
      instructions: local!report.description,
      totalCount: local!report.totalCount,
      columns: {
        a!forEach(
          items: local!report.columnConfigs,
          expression: with( 
            local!columnData: index( local!report.data,fv!item.field,{}),
            local!columnDataCount: count( local!columnData),
            /*local!configuredFormatting: local!report.columnConfigs.configuredFormatting,*/
            local!configuredFormatting:apply(tostring(_),local!report.columnConfigs.configuredFormatting),
            a!gridTextColumn(
              label: fv!item.label,
              field: fv!item.field,
              data:with( local!label:fv!item.label,
              local!field:fv!item.field,
                if(
                local!columnDataCount > 0,
                 a!forEach(
          items: local!columnData,
          expression: if(
           contains(local!configuredFormatting,"TASK_STATUS"),
            index(
              {
                "Assigned",
                "Accepted",
                "Completed",
                "Not Started",
                "Cancelled",
                "Paused",
                "Unattended",
                "Aborted",
                "Cancelled By Exception",
                "Submitted",
                "Running",
                "Error"
              },
              /*
              * Task status ids start with 0, so add one to reach the first index 
              */
              tointeger(index(local!columnData, fv!item + 1, -1 )),
              "Other"
            ),
            tostring(fv!item)
          )
        ),
        
                {}
              )),
              links: if(
                fv!item.configuredDrilldown = "TASK_DETAILS",
                a!forEach(
                  items: index(
                    local!report.data,
                    fv!item.drilldownField,
                    {}
                  ),
                  expression: a!processTaskLink(
                    task: fv!item
                  )
                ),
                null
              )
            )
          )
        )
      },
      value: local!pagingInfo,
      saveInto: local!pagingInfo
    )
  )
)