{"id":472,"date":"2026-07-27T18:46:51","date_gmt":"2026-07-27T16:46:51","guid":{"rendered":"https:\/\/onartline.com\/onartline-faq\/"},"modified":"2026-08-08T09:55:43","modified_gmt":"2026-08-08T07:55:43","slug":"onartline-faq","status":"publish","type":"page","link":"https:\/\/onartline.com\/en\/onartline-faq\/","title":{"rendered":"Onartline FAQ"},"content":{"rendered":"<section class=\"l-section wpb_row height_large\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_grid cols_1 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_top type_default stacking_default\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3 style=\"text-align: center;\">FAQ \u2013 Frequently Asked Questions about Onartline Multisite Domain Mapping<\/h3>\n<\/div><\/div><div class=\"w-separator size_medium\"><\/div><div class=\"w-tabs accordion toggle_style_1 has_scrolling\" style=\"--sections-title-size:inherit;--sections-gap:0.5rem;\"><div class=\"w-tabs-sections titles-align_none icon_chevron cpos_right\"><div class=\"w-tabs-section\" id=\"hd44\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-hd44\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">Can I install Onartline Multisite Domain Mapping on an already existing Multisite network?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-hd44\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> We recommend against it. Onartline Multisite Domain Mapping is designed for new Multisite installations and wasn&#8217;t built to be integrated into an already active network afterward. If you&#8217;re already running a live Multisite network, we recommend first setting up a new installation and migrating your existing content there, rather than integrating the plugin into your current network. You&#8217;ll find a detailed guide in our <a title=\"Setup Onartline Multisite Domain Mapping\" href=\"https:\/\/onartline.com\/en\/setting-up-onartline-multisite-domain-mapping\/\">setup guide<\/a>.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"sec6\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-sec6\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">The domain redirects in a loop \u2013 what can I do?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-sec6\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> A redirect loop usually happens due to a duplicate redirect \u2013 for example, when a &#8220;Preferred Domain&#8221; setting in the hosting panel (such as Plesk) is active at the same time as the plugin&#8217;s 301 redirect. You&#8217;ll find the exact causes and the right solution for your hosting setup step by step in our <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/onartline.com\/en\/setting-up-onartline-multisite-domain-mapping\/#Step_4_Plesk_Users_%E2%80%93_Disable_%E2%80%9CPreferred_Domain%E2%80%9D\">setup guide<\/a>.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"c03e\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-c03e\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">sunrise.php wasn&#8217;t copied automatically \u2013 what now?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-c03e\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> In rare cases, the <code>sunrise.php<\/code> file may not be copied automatically to the <code>\/wp-content\/<\/code> directory when activating the plugin, for example due to missing write permissions on the server. In this case, you can simply copy the file manually from the plugin folder to <code>\/wp-content\/sunrise.php<\/code> and then add the line <code>define( 'SUNRISE', true );<\/code> to your wp-config.php. You&#8217;ll find a detailed step-by-step guide in our <a title=\"Setting up Onartline Multisite Domain Mapping\" href=\"https:\/\/onartline.com\/en\/setting-up-onartline-multisite-domain-mapping\/#Step_3_Set_Up_sunrisephp\">setup guide<\/a>.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"i197\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-i197\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">Why isn&#8217;t the plugin working on my website?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-i197\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> Onartline Multisite Domain Mapping requires a WordPress Multisite installation with WordPress 7.0 and PHP 8.3 or higher. The plugin cannot function on a single WordPress installation (single-site installation) without an activated Multisite network.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"s2fb\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-s2fb\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">Can website administrators manage their own domains?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-s2fb\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> Yes, that&#8217;s possible. The Super Admin can enable this feature under <strong>Network Admin<\/strong> \u2192 <strong>Domain Mapping<\/strong> \u2192 <strong>Settings<\/strong> \u2192 <strong>Site Admin Domain Mapping<\/strong>, allowing individual website administrators to manage their own domain settings.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"z44d\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-z44d\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">Does the plugin support automatic updates?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-z44d\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> Yes. Onartline Multisite Domain Mapping is published in the <a title=\"Download Onartline Multisite Domain Mapping\" href=\"https:\/\/wordpress.org\/plugins\/onartline-multisite-domain-mapping\/\" target=\"_blank\" rel=\"noopener\">official WordPress plugin directory<\/a>. Updates work automatically through the WordPress admin, just as you&#8217;re already used to with other plugins.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-tabs-section\" id=\"n5b0\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><button class=\"w-tabs-section-header\" aria-controls=\"content-n5b0\" aria-expanded=\"false\"><div class=\"w-tabs-section-title\" itemprop=\"name\">I\u2019ve uninstalled the plugin, but I\u2019m still seeing errors relating to sunrise.php or \u2018headers already sent\u2019 \u2013 what\u2019s happened?<\/div><div class=\"w-tabs-section-control\"><\/div><\/button><div  class=\"w-tabs-section-content\" id=\"content-n5b0\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"w-tabs-section-content-h i-cf\" itemprop=\"text\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><strong>Answer:<\/strong> This error occurs when the line <code>define( 'SUNRISE', true );<\/code> wasn&#8217;t removed from <code>wp-config.php<\/code> after uninstalling the plugin. Since the <code>sunrise.php<\/code> file no longer exists after uninstallation, WordPress still tries to load it and fails. To fix this, simply remove that line from your <code>wp-config.php<\/code>.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"FAQ \u2013 Frequently Asked Questions about Onartline Multisite Domain Mapping Can I install Onartline Multisite Domain Mapping on an already existing Multisite network?Answer: We recommend against it. Onartline Multisite Domain Mapping is designed for new Multisite installations and wasn&#8217;t built to be integrated into an already active network afterward. If you&#8217;re already running a live...","protected":false},"author":2,"featured_media":473,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-472","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/pages\/472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/comments?post=472"}],"version-history":[{"count":9,"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/pages\/472\/revisions"}],"predecessor-version":[{"id":475,"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/pages\/472\/revisions\/475"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/media\/473"}],"wp:attachment":[{"href":"https:\/\/onartline.com\/en\/wp-json\/wp\/v2\/media?parent=472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}