RaceSlot is run by one operator, and support is a conversation with them. There is no ticket system and no chat; write an email.
If the contact above says it is not set, ask whoever gave you your invite -- they know who runs this deployment.
Since helper 3.47.0 the server address must start with https://. The sign-in screen refuses anything else with the sentence “The server address must start with https://”, and a saved address that does not is refused in the Activity log on every start. Check the Server field on the helper's sign-in screen, or reinstall from the command on the Downloads page, which carries the right address.
Dry run is on by default and is a switch on the helper's Settings, on the General tab. While it is on, the helper claims the work, writes down the click it would have made, and touches nothing; RaceSlot then reports that as a dry run rather than as a registration. Switch it off; if the bar on the left says the agent is stopped, press Resume there.
The message names what the helper actually saw. The usual causes are on the PC: the iRacing client is closed, it is sitting at its own sign-in screen, the helper is stopped, or it is still in Dry run. Start the helper before the client -- a client that was already open exposes almost nothing to it -- and try once more. A registration is reported as a success only once the helper has seen iRacing's green “Registered / You may join your session” bar, so a failure is a failure.
RaceSlot only knows about registrations it made itself; nothing can ask iRacing what you are in. If you joined or left a session inside the client, its record has gone stale. One tap of Withdraw resyncs it: if there is genuinely nothing to leave, the helper answers that nothing is registered and the record is cleared.
The Queue tab keeps the reason on the row. “Nothing was attempted -- the PC agent is offline (last seen N ago)” means the PC was off or the helper was not running when the moment came; a queued session waits for the PC and gives up after its window. Other reasons it can give: every write is paused on the server, or the last hour is too close to the ceiling of 20 actions to spend more.
iRacing does not allow a withdrawal in the last 2 minutes before a race starts, so RaceSlot refuses to enter a race, or to switch away from a held one, inside that deadline rather than cost you a forfeit. A race is also refused wherever the operator has not switched race registration on, and the message says which.
A window cannot be drawn over iRacing in exclusive Full Screen mode, and the helper says so rather than drawing invisibly: “The overlay cannot draw over iRacing in Full Screen mode. In iRacing: Options -> Graphics -> Display Mode -> Borderless Window.” VR is not supported at all. Check the hotkey on the helper's Overlay pane too: the default toggles the overlay, and a refused hotkey keeps the previous one.
By default the helper keeps running in the tray when the window is closed or minimised -- the icon beside the clock. Right-click it for Open and Quit; double-click opens the window. The switch is on the helper's Settings pane (“Keep running in the tray when the window is closed”); untick it and the X quits as it used to. The overlay stays up either way.
Include these, and the operator can usually answer from the first email:
To see, correct or delete what RaceSlot holds about you, the privacy policy says what there is and how. Deleting the account is self-service: Account has a Delete your account control that removes everything at once, after you type your email. Anything you cannot do from a screen, ask [email protected].
If you find a vulnerability in RaceSlot or its helper, tell the operator at [email protected] before anyone else, with enough detail to reproduce it. They will acknowledge it, fix it, and say when it is fixed; please give them the time to.