When downloading with DAP, there is an error Flash Timeout. Reset the Target and try it again and Error: Flash Download failed - "Cortex-M3"

Since I am a beginner at 32, there is a problem when downloading the program at the beginning, so I will record it here: At
the beginning, I followed what I said on the Internet, choose what should be selected, and what should be ticked:




After these are all ready, compile the program to download, and the result is still reported. What is wrong with the following?


Finally, after finding a solution on the Internet, just change the normal in the options below to under Reset

and then the download will be successful.