Can anybody help me with this? see picture. I am trying to change my settings to get the insider build which were previously working now I get this error message each time I try to change the settings.

TIA

DJ SteveClick image for larger version. 

Name:	Insider build fault 24-09-2015 16-51-25.jpg 
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ID:	39187 Click image for larger version. 

Name:	24-09-2015 16-52-46.jpg 
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ID:	39188