Can't Generate Promo Codes

If the app has not been released, then the Promo Codes can not be used, so it doesn't make sense to generate them.

Promo Codes are a way of providing free copies of a paid app.
They are not used for a preview version of the app, before it is released.
For that, you would use TestFlight.

Having same issue with released app. Previous codes generated successfully.

Same for me, it's been a couple of days now... and Facebook is requesting codes to do their regular validation checks, the clock is ticking!
Apple is looking into it. Made them aware of that thread.

Same its been several days and I still can't make promo codes.

same

Same here.

Generate Promo Code The promo code for the following could not be generated. Try generating it again.

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Facebook is not involved.

I've been in contact with Apple. They let me know it was now fixed, and it is indeed working for me again. Thanks everybody for the commentary.