Woodmart Theme settings displaying error

when I click the Theme settings, I redirect to this error…

/* Site width */ /* Header Boxed */ @media (min-width: 1025px) { .whb-boxed:not(.whb-sticked):not(.whb-full-width) .whb-main-header { max-width:
Fatal error: Uncaught TypeError: Unsupported operand types: string – int in C:\xampp\htdocs\recom\wordpress\wp-content\themes\woodmart\inc\classes\Themesettingscss.php:357 Stack trace: #0 C:\xampp\htdocs\recom\wordpress\wp-content\themes\woodmart\inc\classes\Themesettingscss.php(42): WOODMART_Themesettingscss->get_theme_settings_css() #1 C:\xampp\htdocs\recom\wordpress\wp-content\themes\woodmart\inc\classes\Themesettingscss.php(83): WOODMART_Themesettingscss->get_all_css() #2 C:\xampp\htdocs\recom\wordpress\wp-includes\class-wp-hook.php(287): WOODMART_Themesettingscss->write_file(”) #3 C:\xampp\htdocs\recom\wordpress\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #4 C:\xampp\htdocs\recom\wordpress\wp-includes\plugin.php(484): WP_Hook->do_action(Array) #5 C:\xampp\htdocs\recom\wordpress\wp-content\themes\woodmart\inc\options\class-page.php(187): do_action(‘xts_before_them…’) #6 C:\xampp\htdocs\recom\wordpress\wp-includes\class-wp-hook.php(287): XTS\Page->page_content(”) #7 C:\xampp\htdocs\recom\wordpress\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(”, Array) #8 C:\xampp\htdocs\recom\wordpress\wp-includes\plugin.php(484): WP_Hook->do_action(Array) #9 C:\xampp\htdocs\recom\wordpress\wp-admin\admin.php(259): do_action(‘toplevel_page_x…’) #10 {main} thrown in C:\xampp\htdocs\recom\wordpress\wp-content\themes\woodmart\inc\classes\Themesettingscss.php on line 357
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