Trying to get stick V working

[JhonnyTank]

I am trying to get the Stick V working.
I flashed it with the firmware 1.2 of target trace.
I am using this code wit UIFlow Beta:
from m5stack import *
from m5ui import *
from uiflow import *
import unit

setScreenColor(0x222222)

rectangle0 = M5Rect(134, 104, 30, 30, 0xFFFFFF, 0xFFFFFF)
Follow = M5Title(title="Title", x=3 , fgcolor=0xFFFFFF, bgcolor=0x0000FF)
label0 = M5TextBox(5, 30, "Text", lcd.FONT_Default,0xFFFFFF, rotate=0)
label1 = M5TextBox(70, 30, "Text", lcd.FONT_Default,0xFFFFFF, rotate=0)

x = None
y = None
h = None
w = None

def buttonA_wasPressed():
global x, y, h, w
V0.setTrackAreaCoordinate(140, 100, 40, 40)
pass
btnA.wasPressed(buttonA_wasPressed)

Follow.setTitle('Follow the rabbit')
V0 = unit.get(unit.TARGET_TRACE, unit.PORTB)
while True:
x = V0.getTrack_X()
y = V0.getTrack_Y()
h = V0.getTrack_Height()
w = V0.getTrack_Width()
label0.setText(str(x))
label1.setText(str(y))
rectangle0.setPosition(x, y)
rectangle0.setSize(h, w)
wait_ms(2)

And getting the following error-Message:
'module' object has no attribute 'TARGET_TRACE'