WP Fastest Cache – Please Read

Sometimes “drag n drop up-loader” won’t work due wp nonce security system. (You’ll see an error message says that the “upload failed” or “the upload exceeds the maximum limit …”)

If a page is cached, the Nonce value is cached as well. If the cache is not cleared “twice a day”, the Nonce is expired so we need to add a cache timeout rule as below.

In order to fix that, you need to follow instruction here – https://www.wpfastestcache.com/tutorial/wordpress-nonce-cache/