@jiafoongwee Thanks a lot. This solved the problem. 
Posts made by ardhous
- Opera for Windows
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Opera for WindowsRE: Cannot load Gmail ... "Cookie Mismatch"
Hello, there. If you still have the issue, maybe this can help you. I was excluding the cookies, but was running to the same problem you were running to. Today, I asked Opera to remove ALL cookies since THE BEGINNING and FOR LIFE - and not just last weeks
or last months which is what I did previously. I am thrilled to find out it worked! As Elza could have have sang, just let those cookies go... Good luck! Regards, AndréMore info on how to get to Cookies here: http://help.opera.com/opera/Windows/2178/en/controlPages.html#manageCookies