The iracing.com service is incompatible with Brave, it fails with “System Not In Service”:
It requires communicating with software that runs a HTTP server on localhost, and fails with errors such as:
GET http://127.0.0.1:32034/get_sim_status?object=simStatus&1483852029981 403 (Forbidden)
You need to sign up for a paid account to reproduce the issue. As far as I can tell there is no workaround except to use a different browser.
All other browsers (that I know of) are compatible with the iRacing service.