[Fix] Handling of deleted employee in master task

app/src/plugins/tm@modal/master-task/_components/a-tasks-table.vue

@@ -47,8 +47,8 @@ export default {
 
 				return {
 					...subtask,
-					_employeeInitials: employee._initials,
-					_employeeFullName: employee._fullName
+					_employeeInitials: employee ? employee._initials : '?',
+					_employeeFullName: employee ? employee._fullName : ''
 				}
 			})
 		}