I was suspicious when my primary WordPress site fell to 0 revenue, but maybe everyone who visited had adblocker on. When it lasted 5 days— and when Small Sophie was not around— I took a look at my stats and was surprised to find that I also had 0 views. I checked my site. The home page worked but all the subpages, the content actually useful to the young musician or otherwise, had 404 errors. I use WordPress, and this situation is possible when the .htaccess file has issues. Since it is WordPress, there is an easy solution: I regenerated…