The genealogy display in Unilevel MLM Pro and Forced Matrix MLM Pro is divided into two pages. The first page shows a summary of the total count of members are various levels in your downline. This page looks like the image below.
When you click a particular level, the subsequent page shows the list of members at that level in your downline. This is the View Members page and looks like the image below.
Direct Access to this page will produce an error or will not show the list of members as this page is supposed to show the list of members at a particular level. Without the correct level parameter being available to this page, it would not show the list of members.
We would hence recommend deleting this page from the menu. (do not delete the page itself, just delete the menu item from WP Admin -> Appearance -> Menus)