fixed recompile outside of page admin config

classes/plugin/AdminController.php

@@ -2164,8 +2164,10 @@ class AdminController extends AdminBaseController
             return false;
         }
 
+        $default_scheme = $this->grav['config']->get('plugins.admin.whitelabel.color_scheme');
+
         $preview = $this->post['preview'] ?? false;
-        $data = ['color_scheme' => $this->data['whitelabel']['color_scheme'] ?? null];
+        $data = ['color_scheme' => $this->data['whitelabel']['color_scheme'] ?? $default_scheme];
         $output_file = $preview ? 'admin-preset.css' : 'admin-preset__tmp.css';
 
         $options = [

themes/grav/app/whitelabel/index.js

@@ -13,7 +13,7 @@ const compiler = (element, preview = false, exportScss = false, callback = () =>
     Compile({
         preview,
         exportScss,
-        color_scheme: fields.filter((value, key) => key.match(/^data\[whitelabel]\[color_scheme]/)).toJS(),
+        color_scheme: !fields ? [] : fields.filter((value, key) => key.match(/^data\[whitelabel]\[color_scheme]/)).toJS(),
         callback: (response) => {
             callback.call(callback, response);
             resetElement(element);