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OK, this was the issue:
I guess, you've modified locally the xoops_version.php from Content, but then, unfortunately, you have copied it to /news on your server, overwriting the News xoops_version.php, which caused the blanks screen, since it was the wrong file.
Now to the process how I got there.
1) I went to phpMyAdmin and in the "modules" table I disabled the active modules one by one by setting "isactive" to 0. After each module, I checked Admin if it works. After disabling News, I found that it was News module that was giving a problems, since the Admin showed up
2) Then I wanted to check the xoops_version in News to see if it's 1.64, because that could cause some issues. That's when I saw that it was the wrong xoops_version.php
I copied the original one from my News 1.63, and now it works just fine.