Critical Error

Installing this plug-in shows critical error on the settings page of QA.

Any advice?

Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/CoG/Settings.php:148 Stack trace: #0 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(292): QuickAssortments\COG\CoG\Settings->sections(”) #1 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(”, Array) #2 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #3 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Templates/admin/settings/qa_cog_admin_page_body.php(15): do_action(‘qa_cog_main_tab…’) #4 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Helpers/Template.php(80): include(‘/customers/b/9/…’) #5 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Admin/Page.php(167): QuickAssortments\COG\Helpers\Template::include_template(‘/customers/b/9/…’, Array, ‘admin/settings’) #6 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(292): QuickAssortments\COG\Admin\Page->qa_cog_admin_page_body(‘_qa_cog_retail_…’) #7 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(”, Array) #8 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #9 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Templates/admin/settings/admin_page_content.php(15): do_action(‘qa_cog_admin_pa…’, ‘_qa_cog_retail_…’) #10 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Helpers/Template.php(80): include(‘/customers/b/9/…’) #11 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Admin/Page.php(139): QuickAssortments\COG\Helpers\Template::include_template(‘/customers/b/9/…’, Array, ‘admin/settings’) #12 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(292): QuickAssortments\COG\Admin\Page->admin_page_content(”) #13 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(”, Array) #14 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #15 /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/Admin/Page.php(123): do_action(‘qa_cog_admin_pa…’) #16 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(292): QuickAssortments\COG\Admin\Page->admin_page_callback(”) #17 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(”, Array) #18 /customers/b/9/b/countryandcastle.com/httpd.www/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #19 /customers/b/9/b/countryandcastle.com/httpd.www/wp-admin/admin.php(259): do_action(‘quickassortment…’) #20 {main} thrown in /customers/b/9/b/countryandcastle.com/httpd.www/wp-content/plugins/qa-cost-of-goods-margins/src/CoG/Settings.php on line 148`