Swagger: Failed to load API definition when POST and PUT in same controller (Web Api core)

Swagger page is not loading when I have POST and PUT method in the same API controller. If I remove or comment either one from the controller it is working fine.

Is there any way to use both in the same controller.

Swagger page

Below is my code snippets,

Controller:

[HttpGet]
    public async Task<ActionResult<List<Activity>>> List()
    {
        return await _mediator.Send(new List.Query());
    }

    [HttpGet("{id}")]
    public async Task<ActionResult<Activity>> Details(Guid id)
    {
        return await _mediator.Send(new Details.Query { Id = id });
    }

    [HttpPost]
    public async Task<ActionResult<Unit>> Create(Create.Command command)
    {
        return await _mediator.Send(command);
    }

    [HttpPut("{id}")]
    public async Task<ActionResult<Unit>> Edit(Guid id, Edit.Command command)
    {
        command.Id = id;
        return await _mediator.Send(command);
    }

    [HttpDelete("{id}")]
    public async Task<ActionResult<Unit>> Remove(Guid id)
    {
        return await _mediator.Send(new Remove.Command { Id = id });
    }

Swagger configure in Startup

//Included swagger
        services.AddSwaggerGen(options => options.SwaggerDoc(name: "v1", new OpenApiInfo { Title = "Reactivities", Version = "v1" }));

// Enable middleware to serve generated Swagger as a JSON endpoint. app.UseSwagger();

        // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.),
        // specifying the Swagger JSON endpoint.
        app.UseSwaggerUI(x => { x.SwaggerEndpoint("/swagger/v1/swagger.json", "Reactivities - V1"); });

Am I missing something? Please advice.