aspnetboilerplate: Controller Frombody parameter is null

• Abp package version : 5.8.0
• base framework: .Net Core.

        [HttpPost]
        [DisableValidation]
        [DontWrapResult]
        public async Task<IActionResult> Post([FromBody]Update update)
        {
            await _telegramBotAppService.EchoAsync(update);
            return Ok();
        }

I want to handle Telegram Bot with webhook. In a new clean .Net Core solution it works but it not work with my Abp solution.