Edge Proyect TypeError: Cannot call method 'appendChild' of undefined" version 2014.1.1

Hi there, any help with this error?

this is the log:

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[0123/100157:ERROR:renderer_main.cc(226)] Running without renderer sandbox

[0123/100157:ERROR:renderer_main.cc(226)] Running without renderer sandbox

[0123/100157:ERROR:renderer_main.cc(226)] Running without renderer sandbox

[0123/100159:INFO:CONSOLE(1)] "Uncaught TypeError: Cannot call method 'appendChild' of undefined", source: v8/appCss (1)

[0123/100159:INFO:CONSOLE(0)] "event.returnValue is deprecated. Please use the standard event.preventDefault() instead.", source:  (0)

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