I can reproduce it if gz/app/ViewRemote.php is an empty file. Maybe this happens if file gets renewed and in the same moment you try to access it? So file is still empty or something and you try to load the file?
What makes me wonder is that this only happens to ViewRemote. Never saw a similiar error with any other required files...
EDIT: I have a theory:
When we go to admin panel, we fire two ajax requests against ?action=viewremote
If ViewRemote isn't cached, wedge will try to create it very likely on the current-version.js request. But in the same time we will ask again for viewremote, maybe the file is already created, but not completed. So the first thread (current-version.js) is creating the file, but not finished. In the same time the second thread (latest-news.js) is trying to loadSource('ViewRemote'), loadSource checks if file exists (it exists) and then requires it. But it's empty or not done yet. So second thread will result in an error. So this could be kind of a race condition.