WP Statistics插件在开启缓存功能后无法统计访问量。
跟踪发现统计访问量使用的url返回401错误，如下：
https://www.mobibrw.com/wp-json/wpstatistics/v1/hit?_=1603432478&_wpnonce=1b5c35aa31&wp_statistics_hit_rest=yes&ua=Mozilla/5.0%20(Macintosh;%20Intel%20Mac%20OS%20X%2010_15_7)%20AppleWebKit/605.1.15%20(KHTML,%20like%20Gecko)%20Version/14.0%20Safari/605.1.15&url=https://www.mobibrw.com/2020/27156&referred= Failed to load resource: the server responded with a status of 401 (Unauthorized)
比较奇怪的是，如果此时用户登陆，那么反倒不返回任何错误了。