Reply To: Troubleshooting undefined values with GA4 configuration tag fields

[Grayson]

Yo, sounds like your tag is firing before the dataLayer is ready, kind of like showing up to a party before the host’s even there. Try using a trigger to make sure your tag only fires when the dataLayer is complete and ready to go. Haste makes waste, right? So give that a shot, and see if your undefined values become a thing of the past.