As I am working on the stm32G474VETx with LQFP100 packing. For master and slave, I am using same type of board. I am implementing the MODBUS communication using the fiber optic cable but every time I am getting the error code 06 showing that the salv...

I my micro controller not debugging in JTAG MODE it is perfectly working in the working SWD mode.Whenever  I tried to connect using JTAG it showing error (DEV_CONNECT_ERR) cause by the time of opening  C:\ST\STM32CubeIDE_1.12.0\STM32CubeIDE\plugins\c...