system
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Yup, exactly the same problem! It has something to do with this gstatic.com but what is it idk. Hopefully argus will help us solve it tomorrow! 
btw Avast alarmed me when i visited Youtube, because my adblock widged was off hence it loaded adds connected to this gstatic and avast blocked them. As i activated adblock, the adds were gone and avast didn’t say anything on youtube.