Fix for checkout block is not rendered on site editor

includes/class-wc-gateway-komoju-block.php

@@ -45,11 +45,7 @@ public function get_payment_method_script_handles()
 
     public function get_payment_method_data()
     {
-        if (!is_checkout()) {
-            return;
-        }
-
-        if (is_wc_endpoint_url('order-received')) {
+        if (!is_checkout() && !$this->is_site_editor()) {
             return;
         }
 
@@ -75,4 +71,9 @@ public function get_payment_method_data()
             'inlineFields'   => $this->gateway->has_fields,
         ];
     }
+
+    private function is_site_editor()
+    {
+        return strpos($_SERVER['REQUEST_URI'], 'site-editor.php');
+    }
 }

includes/class-wc-gateway-komoju-single-slug.php

@@ -140,6 +140,10 @@ public function create_session_for_fields()
             ],
         ];
 
+        if ($this->get_order_total() == 0) {
+            return null;
+        }
+
         return $komoju_api->createSession($session_params);
     }