Why can't I upgrade firmware to the latest official version from date firmware?

Zyxel_Emily

Question:
Why can't I upgrade firmware to the latest official version from date firmware on web GUI (Cloud Firmware) or Nebula? If the USG FLEX H is running with the date firmware, I cannot upgrade it to the latest official firmware by clicking "Cloud Firmware". Because the official firmware is unavailable on myZyxel.com, I cannot upgrade it by clicking "Local Firmware". Where could I download an official firmware release to successfully upgrade a device?

Answer:
If your USG FLEX H firewall is running a date firmware and you're unable to upgrade to the latest official firmware, reach out to Zyxel support to obtain the appropriate firmware file and upgrade via local upload.
How to contact Zyxel support agent?

Reference:
Why is USG FLEX H firmware unavailable on myZyxel.com?