Not receiving Accelerometer Data from Nano BLE

I am able to connect my app to the Ardunio nano BLE however, I am not able to receive any data. Can Someone help with this issue?

From your information we cannot tell what could be wrong.
Please post your blocks, search this forum for how to do that, or an .aia
The code where you send data in your .ino file of the nano will also be helpful.