Getting 404 on every POST call that the sharepoint customizer is doing

[ma-i0]

What sample tool are you using?
I'm using this sample https://github.com/microsoft/CopilotStudioSamples/tree/main/ui/embed/sharepoint-customizer

Describe the bug
After building the project and deploying to Sharepoint, the Agent is not working because every call to the directConnectUrl return 404. I have tried configuring environmentID + agentID and just directConnectUrl fetching it from the "web App" channel from copilot studio. Nothing works.

To Reproduce
Steps to reproduce the behavior:

1. Build the project with real configs
2. deploy the customizer
3. click the copilot icon
4. the chat will not start

Expected behavior
I expect the chat to start

Screenshots

Additional context
Building with docker apline npm 22 image. No errors during the build.