If you are seeing an error that rld.dll is missing, it is usually because your antivirus quarantined it automatically [1, 5]. To fix it without risking your PC, the safest route is to use a legitimate digital copy (like from Steam), which doesn't require the file at all.

The file is a dynamic link library often associated with older PC games like Cars 2: The Video Game

But the forum post had a useful solution — not a shady download, but a guide: