[help wanted]Join button is disabled/unclickable after successful build and deploy

Description:​​

Hi, thank you for this project.

I cloned the repository from the main branch and followed the setup instructions to build and run the project successfully. However, I am encountering an issue where the ​Join button​ on the interface is disabled (grayed out) and cannot be clicked. Any guidance on what might be causing this or how to debug it would be greatly appreciated.