Error when adding one particular member

I have setup Church Admin for my church and have added all of the members, but when I try to add one particular member I get this error. The member gets added but if I go back in to try and edit, it again errors out. How do I fix this?

Error Details
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An error of type E_ERROR was caused in line 7092 of the file /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/includes/functions.php. Error message: Uncaught TypeError: implode(): Argument #1 ($pieces) must be of type array, string given in /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/includes/functions.php:7092
Stack trace:
#0 /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/includes/functions.php(7092): implode(‘ & ‘, NULL)
#1 /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/includes/directory.php(3531): church_admin_directory_title_name(Array)
#2 /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/includes/functions.php(4907): church_admin_new_household_display(‘120’)
#3 /home/dh_b6kdug/edgewoodcofc.com/wp-content/plugins/church-admin/index.php(2458): church_admin_actions()
#4 /home/dh_b6kdug/edgewoodcofc.com/wp-includes/class-wp-hook.php(308): church_admin_main(”)
#5 /home/dh_b6kdug/edgewoodcofc.com/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(”, Array)
#6 /home/dh_b6kdug/edgewoodcofc.com/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#7 /home/dh_b6kdug/edgewoodcofc.com/wp-admin/admin.php(259): do_action(‘toplevel_page_c…’)
#8 {main}
thrown