Problem with pyforms

[JavadRah]

error while running on Windows 10, python 3.7:

`No need to remove ROS stuff from path
[INFO ] OpenGL.acceleratesupport No OpenGL_accelerate module loaded: No module named 'OpenGL_accelerate'
Traceback (most recent call last):
File "E:/Temp/hazard-labelling/src/main.py", line 225, in
start_app(VideoWindow, geometry=(width/4, height/4, width/2, height/2))
File "E:\Temp\hazard-labelling\python\lib\site-packages\pyforms_gui\appmanager.py", line 209, in start_app
mainwindow = StandAloneContainer(ClassObject)
File "E:\Temp\hazard-labelling\python\lib\site-packages\pyforms_gui\appmanager.py", line 18, in init
w = ClassObject()
File "E:/Temp/hazard-labelling/src/main.py", line 61, in init
self._timeline = ControlEventTimeline('Timeline')
File "E:\Temp\hazard-labelling\python\lib\site-packages\pyforms_gui\controls\control_event_timeline\control_eventtimeline.py", line 57, in init
icon=conf.ANNOTATOR_ICON_DELETE
File "E:\Temp\hazard-labelling\python\lib\site-packages\confapp\settings_manager.py", line 39, in getattribute
return object.getattribute(self, name)
AttributeError: 'SettingsManager' object has no attribute 'ANNOTATOR_ICON_DELETE'

Process finished with exit code 1`

any solution?