diff --git a/project_task_portal_form/controllers/portal_task_creation.py b/project_task_portal_form/controllers/portal_task_creation.py
index 01daabe..f254624 100644
--- a/project_task_portal_form/controllers/portal_task_creation.py
+++ b/project_task_portal_form/controllers/portal_task_creation.py
@@ -103,7 +103,7 @@ class PortalTaskCreation(CustomerPortal):
         values["user_id"] = user.id
 
         # Create task
-        task_id = request.env["project.task"].create(values)
+        task_id = request.env["project.task"].sudo().create(values) #use sudo to avoid access error on resource calendar when user_id is set
 
         # Add attachments
         for file in values.get("attachments", False):