STM32WB55 OTA_BLE ST BLE Sensor

[SOMAR.1]

Helle Evryone , I juste wante to modifiy my file no-ota to file ota, i following the video in youtube https://www.youtube.com/watch?v=mRzZOa3jmuM but the problem whene I want to change start adress my application don't work

[SChan.8]

Refer these steps to modify non OTA file to OTA file

[SOMAR.1]

Thanks, But That exatly what I did but it still doesn't work.