rt_thread studio使用ST-LINK可以下载程序，但是在线调试出错的原因？

使用ST-LINK可以下载程序，但是在线调试出错。
STMicroelectronics ST-LINK GDB server. Version 5.8.0
Copyright (c) 2020, STMicroelectronics. All rights reserved.
Starting server with the following options:
      Persistent Mode          : Disabled
      LogFile Name             : debug.log
      Logging Level             : 31
      Listen Port Number       : 61235
      Status Refresh Delay    : 15s
      Verbose Mode             : Disabled
      SWD Debug                : Enabled
Target connection mode: Default
Reading ROM table for AP 0 @0xe00fffd0
Hardware watchpoint supported by the target
COM frequency = 4000 kHz
ST-LINK Firmware version : V2J35S7
Device ID: 0x413
PC: 0x8005ec0
ST-LINK device status: HALT_MODE
ST-LINK detects target voltage = 3.16 V
ST-LINK device status: HALT_MODE
ST-LINK device initialization OK
Waiting for debugger connection...
Waiting for connection on port 61235...
Accepted connection on port 61235...
Debugger connected
Wrapping read detected. Addr: 0xffffffff; Length: 4
Wrapping read detected. Addr: 0xffffffff; Length: 4
------ Switching to STM32CubeProgrammer -----
   -------------------------------------------------------------------
                     STM32CubeProgrammer v2.7.0-RC1
   -------------------------------------------------------------------
Log output file: C:\Users\lml\AppData\Local\Temp\STM32CubeProgrammer_a06808.log
ST-LINK SN  : 3A1A151A7115303030303032
ST-LINK FW  : V2J35S7
Board    : --
Voltage    : 3.16V
Error: ST-LINK error (DEV_TARGET_NOT_HALTED)
Encountered Error when opening D:\RT-ThreadStudio\repo\Extract\Debugger_Support_Packages\STMicroelectronics\ST-LINK_Debugger\1.6.0\tools\bin\STM32_Programmer_CLI.exe
------ Switching context -----
Error in STM32CubeProgrammer
Debugger connection lost.
Shutting down...