Errors On Logout

I have started receiving the following errors when the Force Refresh plugin is activated:

Warning: Constants may only evaluate to scalar values in /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php on line 30

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-login.php on line 453

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-login.php on line 468

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-login.php on line 470

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 957

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 958

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 959

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 960

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 961

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 962

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 965

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 966

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 969

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 970

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 971

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 972

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 975

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 976

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 977

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 978

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 981

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 1251

Warning: Cannot modify header information – headers already sent by (output started at /home2/cfhonet/public_html/cfho_prod/wp-content/plugins/force-refresh/filter-force-refresh.php:30) in /home2/cfhonet/public_html/cfho_prod/wp-includes/pluggable.php on line 1254

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