Why am I getting an error: No debug probe detected, Arduino STM32F103C8Txxx using usb directly, no port even after successful flashing and bootload with FTDI TTL? Is there a setting in the software or is there a driver issue? my system is Windows10,64bit

[Tesla DeLorean]

>>No debug probe detected

You have an ST-LINK or some random board, Black / Blue Pill ?

STM32 Cube Programmer is NOT an Arduino tool

It is designed to use an ST-LINK, an STM32 in ROM Boot Loader mode, UART or USB (DFU)

If you've got an Arduino loader on it, use the Arduino IDE, or whatever drag-n-drop interface it provides.

Here's the manual for the tool https://www.st.com/resource/en/user_manual/um2237-stm32cubeprogrammer-software-description-stmicroelectronics.pdf

There are videos on YouTube too

[Andrew Neil]

@RShar.8​ "Why am I getting an error: No debug probe detected"

Because whatever tool(s) you're using was not able to detect a debug probe!

So:

1. do you actually have a debug probe (eg, ST-Link) at all?
2. are you sure that it is properly connected to both your host computer and your target?

EDIT: see https://community.st.com/s/question/0D53W00001YdJPkSAN/no-st-link-connected

It's not clear to me what tools you are using but, if you're using the Arduino IDE, then you'll need to ask Arduino about that - it's nothing to do with ST:

https://forum.arduino.cc/