Error 405 Method Not Allowed when sending a PUT AJAX request to Spring Boot with jQuery? – Jquery ajax

I’m getting 405 in console, when I send PUT request.

Here is my ajax call, which is part of bigger function:

triggerPutRequest(id, stringDate, isDone, title)
                .then((data) => {
                    console.log(data);
                })
                .catch((error) => {
                    alert(error);
                });


function triggerPutRequest(isDone, id, stringDate, title) {
    
        return new Promise((resolve, reject) => {
    
            $.ajax({
                type: 'PUT',  // http method
                url: window.location + "api/tasks", //endpoint on our backend
                contentType: "application/json; charset=utf-8",
                dataType: 'json',
                data: JSON.stringify({
                    "id": id,
                    "title": title,
                    "dueDate":  convertDateToString(new Date(datepicker.value)),
                    "done": isDone,                                         
                }),
    
                success: function (data) {
                    resolve(data)
                },
                error: function () {
                    reject("string")
                }
            });
    
        })
    
    }

In my Spring Boot I have simple Task model object with omitted unrelevant fields:

public class Task {
    
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name = "id", unique = true, nullable = false)
        private int id;

        @Column(name = "due_date", unique = false, nullable = false)
        @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
        private LocalDate dueDate;

        @NotEmpty(message = "cannot be empty string")
        @Column(name = "title", unique = true, nullable = false)
        private String title;
    
        @Column(name = "done", unique = false, nullable = false)
        private boolean done;
}

My controller class in Spring Boot and endpoint method for updating look like this:

@RestController
@RequestMapping(value="/api/tasks")

public class TaskController {
    @PutMapping(value="/", consumes="application/json")
    public ResponseEntity<Task> updateTask(@RequestBody Task taskToBeUpdated){
        //update object logic
        return new ResponseEntity<Task>(newlyAddedTask, HttpStatus.OK);
    }
}