Pages Unable to create a project When Use direct upload

Deploy a site by uploading your project, error occurs:

{
"result": null,
"success": false,
"errors": [
{
"code": 8000000,
"message": "An unknown error occurred. Contact your account team or Cloudflare support: https://cfl.re/3WgEyrH."
}
],
"messages": []
}