Uploading with Sipeed RV-Debugger Plus gets stuck

I am trying to upload firmware for Longan Nano v1.1 using RV-Debugger Plus. I connected TCK, TDI, TDO, TMS, 3V3, GND, T0, and R0 lines between them and the debugger is connected to my computer via a USB C-to-A cable. The project configuration is as follows:

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter, extra scripting
;   Upload options: custom port, speed and extra flags
;   Library options: dependencies, extra library storages
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:sipeed-longan-nano]
platform = gd32v
framework = gd32vf103-sdk
board = sipeed-longan-nano
monitor_speed = 115200

upload_protocol = sipeed-rv-debugger

Since the default OpenOCD configuration for RV-Debugger finds a device named Dual RS232 and the actual USB device name is JTAG Debugger, I modified sipeed-rv-debugger.cfg in .platformio/packages/tool-openocd-gd32v/share/openocd/scripts/interface/ftdi as follows:

interface ftdi
#ftdi_device_desc "Dual RS232"
ftdi_device_desc "JTAG Debugger"
ftdi_vid_pid 0x0403 0x6010

#autoexit true

#interface cmsis-dap
transport select jtag
ftdi_layout_init 0x0008 0x001b
ftdi_layout_signal nSRST -oe 0x0020 -data 0x0020

With these setups, uploading longan-nano-blink example prints the following output and gets stuck:

Processing sipeed-longan-nano (platform: gd32v; framework: gd32vf103-sdk; board: sipeed-longan-nano)
-------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/gd32v/sipeed-longan-nano.html
PLATFORM: GigaDevice GD32V (1.3.0) > Sipeed Longan Nano
HARDWARE: GD32VF103CBT6 108MHz, 32KB RAM, 128KB Flash
DEBUG: Current (altera-usb-blaster) External (altera-usb-blaster, gd-link, jlink, rv-link, sipeed-rv-debugger, um232h)
PACKAGES: 
 - framework-gd32vf103-sdk @ 1.0.0 
 - tool-dfuutil @ 1.9.200310 
 - tool-gd32vflash @ 0.1.0 
 - tool-openocd-gd32v @ 0.1.1 
 - toolchain-gd32v @ 9.2.0
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 0 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Checking size .pio/build/sipeed-longan-nano/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [=         ]   7.0% (used 2310 bytes from 32768 bytes)
Flash: [=         ]   5.0% (used 6572 bytes from 131072 bytes)
Configuring upload protocol...
AVAILABLE: altera-usb-blaster, gd-link, jlink, rv-link, serial, sipeed-rv-debugger, um232h
CURRENT: upload_protocol = sipeed-rv-debugger
Uploading .pio/build/sipeed-longan-nano/firmware.elf
Open On-Chip Debugger 0.10.0+dev-00911-gcfbca74bd (2019-09-12-09:31)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
Warn : Transport "jtag" was already selected
jtag
adapter speed: 1000 kHz

Info : clock speed 1000 kHz
Info : JTAG tap: riscv.cpu tap/device found: 0x1000563d (mfg: 0x31e (Andes Technology Corporation), part: 0x0005, ver: 0x1)
Warn : JTAG tap: riscv.cpu       UNEXPECTED: 0x1000563d (mfg: 0x31e (Andes Technology Corporation), part: 0x0005, ver: 0x1)
Error: JTAG tap: riscv.cpu  expected 1 of 1: 0x1e200a6d (mfg: 0x536 (Nuclei System Technology Co.,Ltd.), part: 0xe200, ver: 0x1)
Info : JTAG tap: auto0.tap tap/device found: 0x790007a3 (mfg: 0x3d1 (GigaDevice Semiconductor (Beijing)), part: 0x9000, ver: 0x7)
Error: Trying to use configured scan chain anyway...
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 5 -expected-id 0x790007a3"
Warn : Bypassing JTAG setup events due to errors
Info : datacount=4 progbufsize=2
Info : Exposing additional CSR 3040
Info : Exposing additional CSR 3041
Info : Exposing additional CSR 3042
Info : Exposing additional CSR 3043
Info : Exposing additional CSR 3044
Info : Exposing additional CSR 3045
Info : Exposing additional CSR 3046
Info : Exposing additional CSR 3047
Info : Exposing additional CSR 3048
Info : Exposing additional CSR 3049
Info : Exposing additional CSR 3050
Info : Exposing additional CSR 3051
Info : Exposing additional CSR 3052
Info : Exposing additional CSR 3053
Info : Exposing additional CSR 3054
Info : Exposing additional CSR 3055
Info : Exposing additional CSR 3056
Info : Exposing additional CSR 3057
Info : Exposing additional CSR 3058
Info : Exposing additional CSR 3059
Info : Exposing additional CSR 3060
Info : Exposing additional CSR 3061
Info : Exposing additional CSR 3062
Info : Exposing additional CSR 3063
Info : Exposing additional CSR 3064
Info : Exposing additional CSR 3065
Info : Exposing additional CSR 3066
Info : Exposing additional CSR 3067
Info : Exposing additional CSR 3068
Info : Exposing additional CSR 3069
Info : Exposing additional CSR 3070
Info : Exposing additional CSR 3071
Info : Examined RISC-V core; found 1 harts
Info :  hart 0: XLEN=32, misa=0x40901105
Info : Listening on port 3333 for gdb connections
Info : device id = 0x19060410
Info : flash_size_in_kb = 0x0000f000
Info : flash size = 61440kbytes
Info : Device Security Bit Set

Environment

OS: Manjaro Linux

DE: KDE Plasma (see below)

Operating System: Manjaro Linux 
KDE Plasma Version: 5.27.1
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.0.19-4-MANJARO (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1080/PCIe/SSE2

Editor: VS Code

sipeed / platform-gd32v

Uploading with Sipeed RV-Debugger Plus gets stuck #39

Environment