I'll get to the blank notes and a solution in a second. First I want to complain about another issue, namely, the annoyance of trying to scroll through a week's worth of notes and realizing that dragging the scroller one quarter of an inch brings you back three months. If anyone from Evernote reads this, please fix this scrolling annoyance. Maybe dragging the scroller two inches should go back one week, not a quarter inch going back three months.
Now, back to the blank page issue.
The issue is that notes in Windows suddenly become blank. This is fixed after removing and reinstalling the program. Until I search by Tag and suddenly, all of the notes become blank again. And again. The titles are in the side window, but the notes themselves are blank.
The solution is easy. Download Microsoft Edge if you don't have it. I normally use Firefox but there's something about Evernote that annoys Firefox, so stick with Edge. Open Edge, go to Evernote.com and login. Takes a minute to load, so I leave it open and minimize the window when I need to use another program. In fact, the only time I ever use Edge is for Evernote, so I just leave it minimized and open most of the time.
This is not a real solution. But Edge works great. It's super fast once it loads. Searching is much better, so I know what the folks at Evernote are going for.
I have confidence that Evernote will eventually fix this issue. The Windows version keeps improving but it's not there yet. The Edge workaround is super easy until Evernote gets its act together.