ALLOW 3RD PARTY COOKIES TO LOGIN TO XFINITY
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Hi i was having the same issue as almost everyone else. Finally I contacted Xfinity directly and they said there was no issue on their end. I kept trying and trying and still it just looped. Finally I tried to log in on my secondary Chrome Browser account and it worked. I went back to my primary account. Checked my settings and turned off my 3rd party cookie blocking setting and now I am able to sign in again. Hope it helps everyone with the same issue.