You can fix it easily. Please open Dokan theme->includes->wc-template.php file. Now please find this function- function dokan_woo_breadcrumb( $args ). In this function you will find this line 'home' => _x( '<i class="fa fa-home"></i> Home', 'breadcrumb', 'dokan' ), and you have to replace this line as- 'home' => _x( 'Home', 'breadcrumb', 'dokan' ),.
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