One more data point. I run android without a Google account. Starting today, when using Chrome, following a Google search link leads to the google prompt that reads 'just a sec' and then insists that I put in my account information or open a new account, not to the web page the link should open.
Fortunately the trick mentioned above about opening link in new tab leads to desired page.

Have you reported it to Google? Also, it was reported also using the "report a problem" tool in Opera for Android?

Have not reported it to Google. As for the bug report I'm following Opera's arrive:
If your bug is being discussed in the Opera community forums, a report has probably already been filed. Additional reports will then serve no purpose, as they will simply be marked as duplicates.

Using android 5.0.2. Moto e. Same page not avaiable message following google search tumblr links. Just installed opera. Rather disappointing.