Hi Bennett, The critical error when saving the settings is related to a depreciated php function; for those who have upgraded the server to PHP v8+.
Uncaught Error: Call to undefined function get_magic_quotes_gpc()
An error of type E_ERROR was caused in line 519 of the file /home/_____._____.com/_____/public_html/wp-content/plugins/search-meter/admin.php.
Error Details
=============
An error of type E_ERROR was caused in line 519 of the file /home/_____._____.com/_____/public_html/wp-content/plugins/search-meter/admin.php.
Error message: Uncaught Error: Call to undefined function get_magic_quotes_gpc() in /home/_____._____.com/_____/public_html/wp-content/plugins/search-meter/admin.php:519
Stack trace:
#0 /home/_____._____.com/_____/public_html/wp-includes/class-wp-hook.php(307): tguy_sm_options_page()
#1 /home/_____._____.com/_____/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#2 /home/_____._____.com/_____/public_html/wp-includes/plugin.php(476): WP_Hook->do_action()
#3 /home/_____._____.com/_____/public_html/wp-admin/admin.php(259): do_action()
#4 /home/_____._____.com/_____/public_html/wp-admin/options-general.php(10): require_once('/home/_____.__...')
#5 {main}
thrown
Hope this helps.