fds in sdk14

I'm trying to migrate my old app based on buttonless app sdk13 to buttonless app sdk14. I solved issuie according to migrate guide remove chunk things and etc. My app works well until I add fds_init function in my main.c file.
Here's my fds_test_init function

ret_code_t fds_test_init (void)
{
		
		ret_code_t ret = fds_register(fds_evt_handler);
		if (ret != FDS_SUCCESS)
		{
					return ret;
		}
		ret = fds_init();
		if (ret != FDS_SUCCESS)
		{
				return ret;
		}
		return NRF_SUCCESS;
		}

After I comment calling of that function in my main.c the app starts work. After comment again not working. I see nothing in RTT terminal

The same code works well with sdk13