Steam sub payment failed, getting strange error in Mog Station

[SilentClyde]

When I woke up this morning and started Steam, I was shown an error message claiming my 30 day subscription payment could not be completed using my saved payment method. I have used this payment method for every prior payment, and a lack of funds is not the issue here.

I logged into the Mog Station to see if I could get anymore information, and when clicking the "Steam Payment" option under the "Subscription Renewal" category, I was given the following error message:

The Square Enix Account Management System is currently processing upcoming service fees for billing.
During this period, you will not be able to do any of the following:

 - Add/Change Subscriptions
 - Retainer Service
 - Companion App
 - Update Payment Method
 - Add PlayStation®4 License
 - Add Windows® License
 - Add Mac License
 - Add Game Time Card
 - Cancel Subscription
 - Cancel Service Account
 - Cancel Square Enix Account

These actions will become possible once again after the billing processes have completed.
We apologize for the inconvenience and thank you for your understanding and cooperation.

Can anyone help me? I am not opposed to changing my payment method if necessary.

[SilentClyde]

Resolved. I received an email this morning once my game time expired informing me that my sub wasn't paid and my service was cancelled as a result. I was then able to access the Mog Station without any difficulties, and paid my sub. Sadly I don't know what caused my payment to fail in the first place, but considering there's two points of failure here, I'm assuming that either the account management system or Steam had a bit of a hiccup, possibly due to the new year (that seems to be causing a lot of tech problems for some reason).

If you found this thread via Google or whatever search engine and you're in similar circumstances, don't panic. While I recommend submitting a support ticket to Square and Steam, I am rather confident in saying everything will be OK tomorrow. You'll just need to setup your auto-payment again. If you're worried about your veteran rewards, I can personally say I didn't lose any progress towards mine.