The model of the development board is LPCXpresso54S018M, as shown in Figure 1, which is the corresponding package I installed. Figure 2 shows the configuration of flash, as shown in Figure 3, using microusb to connect to the Debug Link, and Figure 4 shows the DAP emulator. Now the code can be debugged normally, but as shown in Figure 5, error will be reported when downloading. I don't know how to solve this problem, I hope my friends can help me, thank you very much!