When i start writing code to STM32F103R8 i am getting two error. Errors are listed below. 1) Flash download failed- Target DLL has canceled. 2)No ULINK2/ME Device found. why these two errors are occurring? how to get rid of this error.

[Tesla DeLorean]

You've selected the wrong make/model of debug pod.

You've connected it incorrectly to a device that doesn't work.

If you are using a device with an ST-LINK debugger, pick that​ in the debugger settings, select SWD or appropriate connection mode, and check that your device can be seen.