If you already own the game, you can still play it and access multiplayer features. If you do not own it, it is no longer available for new digital purchases.

Check your antivirus logs—it likely deleted the crack file. Restore it and create an exclusion folder. Game Crashing:

The "story" of this file is one of digital preservation, the delisting of a modern classic, and the community's effort to keep it playable. The Delisting of a Legend

: A term used in the piracy community for a game that has been heavily compressed (to save bandwidth) and includes a "crack" to bypass Digital Rights Management (DRM). Security and Performance Risks

A version of a game that has been highly compressed to reduce download size. These typically include the full game and all DLCs, pre-cracked for offline play. Forza Horizon 4 Delisting FAQ