I am getting the following error in any popup window in the WP Admin area:
Warning: Invalid argument supplied for foreach() in /home/content/08/10944408/html/wp-content/plugins/user-admin-simplifier/useradminsimplifier.php on line 36
The same error shows when in any type of popup window for any plugin. It does not appear in normal admin pages, and the plugin still seems to be functioning correctly, despite the error.
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