We have been trying for a while to eliminate this error completely. We believe the issue is fixed for all versions of BePro listings later than 2.0.66.
The issue revolves around pages not working on activation or they stop working during an update. This is because of an issue with wordpress permalinks. We have established new features in the plugin to flush permalinks during activation and upgrade. This has fixed the problem
The best way to fix this issue is to upgrade to the latest version of the plugin. Otherwise, if Listing pages produce a 404 error, try resetting your permalink settings in the admin. Simply re-save your current settings, so that they are reset for all urls. The option is under your settings menu.
We hear our customers and understand that a seamless activation, upgrade, and deactivation process is important. This is one example of how we try to make this plugin stable and useful for you.