fail - bluepill_f103c8-stm32

Results in 'USB device not recognised' warning from Windows, device locked up.

Processing bluepill_f103c8-stm32 (upload_protocol: dfu; platform: ststm32; board: bluepill_f103c8; framework: arduino)
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CONFIGURATION: https://docs.platformio.org/page/boards/ststm32/bluepill_f103c8.html
PLATFORM: ST STM32 > BluePill F103C8
HARDWARE: STM32F103C8T6 72MHz 20KB RAM (64KB Flash)
DEBUG: CURRENT(stlink) EXTERNAL(blackmagic, jlink, stlink)
Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF MODES: FINDER(chain) COMPATIBILITY(soft)
Collected 7 compatible libraries
Scanning dependencies...
No dependencies
MethodWrapper(["checkprogsize"], [".pioenvs\bluepill_f103c8-stm32\firmware.elf"])
Memory Usage -> http://bit.ly/pio-memory-usage
DATA:    [          ]   1.4% (used 292 bytes from 20480 bytes)
PROGRAM: [=         ]  10.0% (used 6584 bytes from 65536 bytes)
.pioenvs\bluepill_f103c8-stm32\firmware.elf  :
section             size        addr
.isr_vector          268   134217728
.text               5920   134217996
.rodata              632   134223916
.init_array            8   134224548
.fini_array            4   134224556
.data                 32   536870912
.bss                 260   536870944
._user_heap_stack   1540   536871204
.ARM.attributes       41           0
.comment             126           0
.debug_frame          44           0
Total               8875
<lambda>(["upload"], [".pioenvs\bluepill_f103c8-stm32\firmware.bin"])
AVAILABLE: blackmagic, dfu, jlink, mbed, stlink
CURRENT: upload_protocol = dfu
MethodWrapper(["upload"], [".pioenvs\bluepill_f103c8-stm32\firmware.bin"])
Auto-detected: COM6
maple_upload COM6 2 1EAF:0003 "c:\Users\Peter\Documents\PlatformIO\Projects\avr_test/.pioenvs\bluepill_f103c8-stm32\firmware.bin"
maple_loader v0.1
Resetting to bootloader via DTR pulse
Searching for DFU device [1EAF:0003]...
Found it!

Opening USB Device 0x1eaf:0x0003...
Found Runtime: [0x1eaf:0x0003] devnum=1, cfg=0, intf=0, alt=2, name="STM32duino bootloader v1.0  Upload to Flash 0x8002000"
Setting Configuration 1...
Claiming USB DFU Interface...
Setting Alternate Setting ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
Transfer Size = 0x0400
bytes_per_hash=137
Starting download: [##################################################] finished!
state(8) = dfuMANIFEST-WAIT-RESET, status(0) = No error condition is present
Done!
Resetting USB to switch back to runtime mode
error resetting after download: usb_reset: could not reset device, win error: The system cannot find the file specified.


timeout waiting for COM6 serial
================================================================= [SUCCESS] Took 29.75 seconds =================================================================

========================================================================== [SUMMARY] ==========================================================================
Environment bluepill_f103c8-stm32       [SUCCESS]
Environment bluepill_f103c8-maple       [SKIP]
Environment genericSTM32F103C8          [SKIP]
================================================================= [SUCCESS] Took 29.75 seconds =================================================================