I am working on the Gatt Sensor Data app example code to communicate with Movesense either with another board or my phone using nRF Connect App. Although it used to send data normally, suddenly it stopped sending data and sends the packet {0x01, 0x99, 0x01, 0xFB}, which is HTTP_CODE_INSUFFICIENT_STORAGE, when I try to subscribe for acceleration data.
Why does this happen and how can I deal with it?