Uncaught TypeError

Dear Team,

We are facing below error issue:-

Uncaught TypeError: Unsupported operand types: string – string in C:\xampp\htdocs\wordpress\wp-content\plugins\loan-comparison\settings.php:580 Stack trace: #0 C:\xampp\htdocs\wordpress\wp-content\plugins\loan-comparison\settings.php(26): loancomparison_settings() #1 C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php(287): loancomparison_tabbed_page(”) #2 C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(”, Array) #3 C:\xampp\htdocs\wordpress\wp-includes\plugin.php(484): WP_Hook->do_action(Array) #4 C:\xampp\htdocs\wordpress\wp-admin\admin.php(259): do_action(‘settings_page_l…’) #5 C:\xampp\htdocs\wordpress\wp-admin\options-general.php(10): require_once(‘C:\\xampp\\htdocs…’) #6 {main} thrown in C:\xampp\htdocs\wordpress\wp-content\plugins\loan-comparison\settings.php on line 580