Problem after last update

After the last update, the overview agenda no longer worked. After a long search, I found the cause. It was caused by the WP Security plugin. There is a setting called: Users Enumeration with this description: This feature allows you to prevent external users / bots from fetching the user info with urls like “/? Author = 1”

When I turn this option off, the agenda overview works perfectly. Can you determine whether the latest update is the cause of this and how you or I can solve this? Would like to keep this option activated. Hope you would like to take a look at this? Gr. Peter

The page I need help with: [log in to see the link]