Unity 6 WebGL Error

Hello!
During my use of Cesium for Unity to WebGL。Browser is running with errors. : Uncaught SyntaxError: Invalid or unexpected token。

The web server is using Nginx. And add_header Cross-Origin-Opener-Policy same-origin always;
add_header Cross-Origin-Embedder-Policy require-corp always;
add_header Cross-Origin-Resource-Policy cross-origin always;

The token I used is Default Token。

Could you please explain why this problem occurred?

Unity version:6000.0.26f1c1
Cesium for Unity version:v1.23.2