Traceback (most recent call last):


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner

response = get_response(request)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/core/handlers/base.py", line 145, in _get_response

response = self.process_exception_by_middleware(e, request)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/core/handlers/base.py", line 143, in _get_response

response = response.render()


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/response.py", line 105, in render

self.content = self.rendered_content


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/response.py", line 83, in rendered_content

return template.render(context, self._request)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/backends/django.py", line 61, in render

return self.template.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 171, in render

return self._render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/test/utils.py", line 95, in instrumented_test_render

return self.nodelist.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 936, in render

bit = node.render_annotated(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated

return self.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/loader_tags.py", line 150, in render

return compiled_parent._render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/test/utils.py", line 95, in instrumented_test_render

return self.nodelist.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 936, in render

bit = node.render_annotated(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated

return self.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/loader_tags.py", line 150, in render

return compiled_parent._render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/test/utils.py", line 95, in instrumented_test_render

return self.nodelist.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 936, in render

bit = node.render_annotated(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated

return self.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/loader_tags.py", line 62, in render

result = block.nodelist.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 936, in render

bit = node.render_annotated(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated

return self.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/loader_tags.py", line 62, in render

result = block.nodelist.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 936, in render

bit = node.render_annotated(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated

return self.render(context)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/django/template/library.py", line 192, in render

output = self.func(*resolved_args, **resolved_kwargs)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/templatetags/bootstrap4.py", line 627, in bootstrap_field

return render_field(*args, **kwargs)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/forms.py", line 39, in render_field

return renderer_cls(field, **kwargs).render()


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/renderers.py", line 84, in render

return mark_safe(self._render())


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/renderers.py", line 515, in _render

html = self.post_widget_render(html)


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/renderers.py", line 363, in post_widget_render

html = self.list_to_class(html, "checkbox")


 "/home/rixx/.local/share/virtualenvs/pretalx/lib/python3.8/site-packages/bootstrap4/renderers.py", line 341, in list_to_class

label.input.attrs["class"] = label.input.attrs.get("class", []) + ["form-check-input"]
AttributeError: 'NoneType' object has no attribute 'attrs'

Traceback (most recent call last):


 "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main

"__main__", fname, loader, pkg_name)


 "/usr/lib/python2.7/runpy.py", line 72, in _run_code

exec code in run_globals


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/__main__.py", line 2708, in <module>

main()


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/__main__.py", line 2676, in main

application = Application(tk)


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/__main__.py", line 196, in __init__

page = cls(self.ribbon, self)


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/CNCRibbon.py", line 115, in __init__

self.register()


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/
Page.py", line 392, in register

(SerialFrame,))


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/CNCRibbon.py", line 134, in _register

w = f(self.master._pageFrame, self.app)


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/
Page.py", line 253, in __init__

self.comportRefresh()


 "/home/montagsmodell/Documents/bCNC-master/build/lib/bCNC/
Page.py", line 347, in comportRefresh

for hw in i[2].split(' '):
AttributeError: 'NoneType' object has no attribute 'split'
