Issues with exporting using reverse proxy with NGINX #3

System: Docker compose via Ubuntu 24.04.4 LTS
Hardware info: I5-210H, 48gb vram
When using the service with a reverse proxy (in my case nginx) the editor will throw an export failed issue, when using via localhost issue doesn't occur.
attaching image for reference:

Any attempt of editing will result in this issue.
I don't know what else to attach in terms of logs since the editor is all client side