"Failed to connect to adapter" when flashing the board

I am attempting to flash an STM32F3 board using the following code:

title: Flashing board STM32F3
suite:
 - ident: Power board
   title: Power on
   steps:
     - command: define 3V3Rail "DATP00"
     - command: power 3V3 on
     - command: ground 2
     - command: wait
       timeout: 10s
 - ident: Identify DUT
   title: Identify DUT
   steps:
     - command: identify STM32F3_STLink
 - ident: Erase 
   title: Erase
   steps:
    - command: erase STM32F3_STLink
 - ident: Program 
   title: Program
   steps:
     - command: program STM32F3_STLink vytrum_ui_fw.hex

However, I encountered an error at the step Identify STM32F3_STLink: "failed to connect to adapter." Could you please advise on what steps I can take to resolve this issue?