Had the same problem today. So I fixed it.
If someone is interested in how I did it, here we go:
Fist I installed "Install Chrome extensions" https://addons.opera.com/de/extensions/details/download-chrome-extension-9/?display=en
Then I installed "Momentum" https://chrome.google.com/webstore/detail/momentum/laookkfknpbbblfpciffpaejjkokdgca/related
Then I installed "Momentum" on Chrome and started it.
I analyzed, what sourcefile will be loaded, for me it was chrome-extension://laookkfknpbbblfpciffpaejjkokdgca/dashboard.html
So I switched back to Opera and installed "Custom new tab page" https://addons.opera.com/en/extensions/details/custom-new-tab-page/?display=en
And set the link to the dashboard.html.
That´s it.
Hope I could help you even if the problem is already some months old.