Need Help With Postiz N8n Integration!

Hi, I have installed and setup self hosted postiz on my server using Coolify. But the proboem is I am not able to connect the public api on n8n. When I save the connection on n8n postiz credentials it says conection failed or timout. How can I fix this so It works on n8n. I have tried connecring using http node amd postiz community node both are giving same error. olease help!