Global Mastercard outage stopping shopping in Sydney (smh.com.au)

I can't read the SMH article from here, but this ABC article confirms it also affected Apple Pay. Walking past supermarkets in Perth today I noticed hastily handwritten signs up everywhere saying "No Apple Pay Sorry".

https://www.abc.net.au/news/2026-08-15/mastercard-outage/107...

No details on what caused it yet? Other than a failed update.