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attempt to concatenate a nil value

❌ Error​

attempt to concatenate a nil value (field 'xyz')

📍 Context​

Occurs when you try to join strings with .. but one of the variables is nil. Typical cases:

  • Concatenating player names or database values that are missing.
  • Combining optional strings without checking.

✅ Solution​

  • Convert nil to empty string before concatenation: local fullName = (firstName or '') .. ' ' .. (lastName or '')
  • Check database results or player data before using them.

ℹ️ Additional Information​

  • Wrap all string operations with nil-safe defaults.