The crack was overwritten by an antivirus. Restore steam_api64.dll from quarantine. Or, the base game was updated by Steam (if you own it legitimately). The CODEX crack only works on specific game versions. Ensure you have the standalone cracked base.
: CODEX’s version acted as a skeleton key. It was a statement that these "Enduring Icons" shouldn't be locked behind a gate, but rather free for every player to experience the moment they booted up the 50GB game . The Legacy of 2K18 WWE.2K18.Enduring.Icons.Pack.Unlocker-CODEX Latest Version