Flowise on Render can't connect tot N8N MPC server on Hostinger

I host Flowise on Render. I use the MCP-tool of Flowise in my Agentflow. I host n8n on Hostinger. I created MCP-servers in n8n. The Flowise on Render can’t connect with the n8n MCP-servers on Hostinger. It seems that Render is blocking this communication. How can I solve this ?