Temporarily disable your firewall and re-run the Authorization Wizard to ensure it can "call home" to IBM servers. Summary Checklist

Subcode 18 can appear if SPSS 28 or earlier licenses are interfering.

: Ensure you are on the latest fix pack. Some login issues in version 29 were resolved in later patches following changes to IBM's license server security.

This is the most common fix for macOS Sonoma users.

"No licenses found for IBM SPSS Statistics 29. ErrCode=1 SubCode=18"