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kCFErrorDomainCFNetwork error 303 - bbc.co.uk login window

people. I cannot get passed this bloody error message

kCFErrorDomainCFNetwork 303

I get a blank page on safari (All latest software across the board for oct 2017) and that's it. If i turn off virus protection, still can't get passed this blank screen and error message. I am now getting annoyed. Who has the answer?

page address is - Sign in

User uploaded file

PS If i open the page on my iPhone, it opens fine

MacBook Pro, macOS Sierra (10.12.6)

Posted on Oct 12, 2017 5:05 AM

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Posted on Oct 12, 2017 8:52 AM

It was the rebooting in safe mode that sorted the issue. I did open safari and the webpage ok there and signed in. Then restarted and all is ok: i can sign in. So I presume something was corrupt and the reboot in safe mode re-wrote a preference or something th awdid the trick. Thank s for the direction Eric

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Question marked as Top-ranking reply

Oct 12, 2017 8:52 AM in response to Daren Pearson

It was the rebooting in safe mode that sorted the issue. I did open safari and the webpage ok there and signed in. Then restarted and all is ok: i can sign in. So I presume something was corrupt and the reboot in safe mode re-wrote a preference or something th awdid the trick. Thank s for the direction Eric

Oct 12, 2017 8:08 AM in response to Daren Pearson

Loads fine for me in Safari 11.


Safari/Preferences/Advanced - enable the Develop menu, then go there and Empty Caches. Quit/reopen Safari and test. Then try Safari/History/Show History and delete all history items. Quit/reopen Safari and test. You can also try try Safari/Clear History…. The down side is it clears all cookies. Doing this may cause some sites to no longer recognize your computer as one that has visited the web site. Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library/Caches/com.apple.Safari/Cache.db and move it to the trash.


Go to Safari Preferences/Extensions and turn all extensions off. Test. If okay, turn the extensions on one by one until you figure out what extension is causing the problem.


Safari Corruption See post by Linc Davis


Safari Reset


If that doesn't work, try running this program in your normal account , then copy and paste the output in a reply. The program was created by etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy Report” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

kCFErrorDomainCFNetwork error 303 - bbc.co.uk login window

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