Expression evaluation error at function 'reject' [line 257]: Incorrect number of parameters for function; expected 1 parameters, but found 2 parameters.

Question

a!localVariables(
 local!selectedPermission,
 local!selectedArea,
 local!selectedComponent,
 local!selectedDepartment,
 local!departments: a!refreshVariable(
 value: rule!MECMS_getDepartmentList(activeFilter: true),
 refreshOnVarChange: { ri!refreshInt }
 ),
 local!area: a!refreshVariable(
 value: if(
 rule!APN_isBlank(local!selectedPermission),
 null,
 rule!MECMS_getRefArea(
 selections: {"id", "value"}, 
 permissionId: local!selectedPermission,
 pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
 ).data
 ),
 refreshOnVarChange: { ri!refreshInt }
 ),
 local!component: a!refreshVariable(
 value: rule!MECMS_getRefComponent(
 selections: {"id", "value", "areaId"}, 
 areaId: if(
 a!isNotNullOrEmpty(local!selectedArea),
 local!selectedArea,
 if(
 rule!APN_isEmpty(local!area),
 -1,
 local!area.id
 )
 ),
 pagingInfo: a!pagingInfo(
 startIndex: 1,
 batchSize: - 1,
 sort: {
 a!sortInfo(field: "areaId", ascending: true),
 a!sortInfo(field: "value", ascending: true)
 }
 )
 ).data,
 refreshOnVarChange: { ri!refreshInt }
 ),
 local!filteredComponents: a!refreshVariable(
 value: if(
 a!isNullOrEmpty(local!selectedComponent),
 local!component,
 index(
 local!component,
 wherecontains(
 tointeger(local!selectedComponent),
 cast(
 typeof({ 1, 2, 3 }),
 index(local!component, "id", null)
 )
 )
 )
 ),
 refreshOnReferencedVarChange: true
 ),
 local!roles: a!refreshVariable(
 value: if(
 rule!APN_isBlank(local!selectedDepartment),
 null,
 rule!MECMS_getDepartmentRoleList(
 departmentId: local!selectedDepartment,
 activeFilter: true
 )
 ),
 refreshOnVarChange: { ri!refreshInt }
 ),
 local!existingCRUD: rule!MECMS_getCRUDEntry(
 componentId: index(local!filteredComponents, "id", null),
 areaID: index(local!area, "id", null),
 pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
 ).data,
 local!temp,
 {
 /* Filters */
 a!sectionLayout(
 label: "",
 contents: {
 a!radioButtonField(
 label: "Permission Type",
 labelPosition: "ABOVE",
 choiceLabels: cons!MECMS_PERMISSION_TYPE_LABELS,
 choiceValues: cons!MECMS_PERMISSION_TYPE_VALUES,
 saveInto: {
 local!selectedPermission,
 a!save(local!selectedDepartment, null),
 a!save(local!selectedArea, null),
 a!save(local!selectedComponent, null),
 a!save(ri!refreshInt, ri!refreshInt + 1)
 },
 value: local!selectedPermission,
 choiceLayout: "COMPACT",
 required: true,
 validations: {}
 ),
 a!columnsLayout(
 columns: {
 a!columnLayout(
 contents: {
 a!dropdownField(
 label: "Department",
 labelPosition: "ABOVE",
 placeholder: "--- Select a Value ---",
 choiceLabels: index(
 local!departments,
 "departmentName",
 null
 ),
 choiceValues: index(local!departments, "id", null),
 saveInto: {
 local!selectedDepartment,
 a!save(local!selectedArea, null),
 a!save(local!selectedComponent, null),
 a!save(ri!refreshInt, ri!refreshInt + 1)
 },
 value: local!selectedDepartment,
 searchDisplay: "AUTO",
 required: true,
 validations: {}
 )
 }
 ),
 a!columnLayout(
 contents: {
 a!dropdownField(
 label: "Area",
 labelPosition: "ABOVE",
 placeholder: "--- Select an Area ---",
 choiceLabels: local!area.value,
 choiceValues: local!area.id,
 saveInto: {
 local!selectedArea,
 a!save(local!selectedComponent, null),
 a!save(ri!refreshInt, ri!refreshInt + 1)
 },
 value: local!selectedArea,
 searchDisplay: "AUTO",
 required: true,
 validations: {}
 )
 }
 ),
 a!columnLayout(
 contents: {
 a!dropdownField(
 label: "Component",
 labelPosition: "ABOVE",
 placeholder: "--- Select a Component ---",
 choiceLabels: index(local!component, "value", null),
 choiceValues: cast(typeof({1,2}), index(local!component, "id", null)),
 saveInto: { local!selectedComponent },
 value: local!selectedComponent,
 searchDisplay: "AUTO",
 validations: {}
 )
 }
 ),
 a!columnLayout(contents: {})
 }
 )
 }
 ),
 /* Grid */
 a!gridLayout(
 label: "Role Based Permissions",
 labelPosition: "ABOVE",
 headerCells: {
 a!gridLayoutHeaderCell(label: "Area - Component"),
 /*a!gridLayoutHeaderCell(label: "Test"),*/
 if(
 rule!APN_isBlank(local!roles),
 {},
 a!forEach(
 items: local!roles,
 expression: a!gridLayoutHeaderCell(label: fv!item.roleName)
 )
 )
 },
 columnConfigs: {
 a!gridLayoutColumnConfig(weight: 3),
 /*a!gridLayoutColumnConfig(weight: "DISTRIBUTE"),*/
 if(
 rule!APN_isBlank(local!roles),
 {},
 a!forEach(
 items: local!roles,
 expression: a!gridLayoutColumnConfig(weight: 1)
 )
 )
 },
 rows: {
 a!forEach(
 items: local!filteredComponents,
 expression: a!localVariables(
 local!currentComponent: fv!item,
 {
 a!gridRowLayout(
 contents: {
 a!richTextDisplayField(
 label: "",
 value: index(
 local!area.value,
 wherecontains(fv!item.areaId, local!area.id),
 null
 ) & " - " & fv!item.value
 ),
 a!forEach(
 items: local!roles,
 expression: a!localVariables(
 local!currentRole: fv!item,
 local!crudForCurrentRole: a!refreshVariable(
 value: reject(
 fn!isnull,
 a!forEach(
 local!existingCRUD,
 if(
 tointeger(index(fv!item, "roleId", null)) = tointeger(index(local!currentRole, "id", null)),
 fv!item,
 null
 )
 )
 ),
 refreshOnReferencedVarChange: true
 ),
 local!currentCRUDId: a!refreshVariable(
 value: reject(
 fn!isnull,
 a!forEach(
 local!crudForCurrentRole,
 if(
 wherecontains(
 tointeger(
 index(local!currentComponent, "id", null)
 ),
 cast(101, index(fv!item, "componentId", null))
 ) = wherecontains(
 tointeger(index(local!currentRole, "id", null)),
 cast(101, index(fv!item, "roleId", null))
 ),
 fv!item.id,
 null
 )
 )
 ),
 refreshAlways: true
 ),
 local!currentCRUD: a!refreshVariable(
 value: cast(
 typeof(
 'type!{urn:com:appian:types:MECMS}MECMS_CRUDEntry'()
 ),
 reject(
 fn!isnull,
 a!forEach(
 local!crudForCurrentRole,
 if(
 rule!APN_isBlank(tointeger(local!currentCRUDId)),
 null,
 if(
 tointeger(index(fv!item, "id", null)) = tointeger(local!currentCRUDId),
 fv!item,
 null
 )
 )
 )
 )
 ),
 refreshOnReferencedVarChange: true
 ),
 local!currentCRUDSelections: a!refreshVariable(
 value: fn!reject(
 fn!isnull,
 {
 if(local!currentCRUD.create, "C", null),
 if(local!currentCRUD.read, "R", null),
 if(local!currentCRUD.update, "U", null),
 if(local!currentCRUD.delete, "D", null)
 }
 ),
 refreshOnReferencedVarChange: true
 ),
 /*a!textField(*/
 /*value: local!currentCRUD*/
 /*),*/
 a!multipleDropdownField(
 label: "",
 placeholder: "---Select a CRUD Value ---",
 choiceLabels: { "Create", "Read", "Update", "Delete" },
 choiceValues: { "C", "R", "U", "D" },
 value: local!currentCRUDSelections,
 saveInto: {
 local!currentCRUDSelections,
 a!save(local!temp, local!currentCRUDId),
 if(
 rule!APN_isBlank(local!currentCRUDId),
 a!writeToDataStoreEntity(
 dataStoreEntity: cons!MECMS_CRUD_ENTRY_DSE,
 valueToStore: {
 'type!{urn:com:appian:types:MECMS}MECMS_CRUDEntry'(
 deptId: tointeger(local!selectedDepartment),
 areaId: tointeger(local!currentComponent.areaId),
 roleId: tointeger(local!currentRole.id),
 componentId: tointeger(local!currentComponent.id),
 create: contains(
 cast(103, local!currentCRUDSelections),
 "C"
 ),
 read: contains(
 cast(103, local!currentCRUDSelections),
 "R"
 ),
 update: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "U"
 ),
 delete: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "D"
 ),
 updateBy: loggedInUser(),
 updateOn: now()
 )
 },
 onSuccess: {
 a!save(
 local!existingCRUD,
 append(
 local!existingCRUD,
 cast(
 typeof(
 {
 'type!{urn:com:appian:types:MECMS}MECMS_CRUDEntry'()
 }
 ),
 fv!storedValues
 )
 )
 )
 }
 ),
 a!writeToDataStoreEntity(
 dataStoreEntity: cons!MECMS_CRUD_ENTRY_DSE,
 valueToStore: {
 'type!{urn:com:appian:types:MECMS}MECMS_CRUDEntry'(
 id: tointeger(local!currentCRUD.id),
 deptId: tointeger(local!selectedDepartment),
 areaId: tointeger(local!currentComponent.areaId),
 roleId: tointeger(local!currentRole.id),
 componentId: tointeger(local!currentComponent.id),
 create: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "C"
 ),
 read: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "R"
 ),
 update: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "U"
 ),
 delete: contains(
 cast(
 typeof({ "1", "2" }),
 local!currentCRUDSelections
 ),
 "D"
 ),
 updateBy: loggedInUser(),
 updateOn: now()
 )
 },
 onSuccess: {
 a!save(
 local!existingCRUD,
 cast(
 typeof(
 {
 'type!{urn:com:appian:types:MECMS}MECMS_CRUDEntry'()
 }
 ),
 a!update(
 local!existingCRUD,
 index(local!currentCRUDId, 1, null),
 fv!storedValues
 )
 )
 )
 }
 )
 )
 }
 )
 )
 )
 }
 )
 }
 )
 )
 },
 selectionSaveInto: {},
 validations: {},
 shadeAlternateRows: true
 ),
 a!columnsLayout(
 columns: {
 a!columnLayout(
 contents: {
 a!buttonArrayLayout(
 buttons: {
 a!buttonWidget(
 label: "BACK",
 style: "DESTRUCTIVE",
 saveInto: {
 a!save(ri!manageCRUD, not(ri!manageCRUD)),
 a!save(
 ri!showParentCancel,
 not(ri!showParentCancel)
 )
 }
 )
 },
 align: "START"
 )
 }
 )
 }
 )
 }
) 
 
 I am getting the above error with reject function so please let me know what causing this error .