Fixing about:invalid#zClosurez on iPhone Safari Browser

About:invalid#zClosurez Safari error on iPhone and iPad quick fix. Safari error about invalid zClosurez when you try to login Gmail on iPhone, iPad, and other iOS devices, including macOS too. The Gmail about:invalid#zClosurez error occurs on the Safari browser when send or forwarding an email on iPhone and iPad.

A lot of iPhone (iOS) users have been nagging about the Gmail invalid zClosurez error on the Safari browser while logging to their Gmail account or forwarding email via their iDevice Safari browser.

What is about:invalid#zClosure?

About:invalid#zClosurez is an error that occurs when you want to log in to either one of the Google services such as Gmail, youtube, or Outlook account on iPhone or iPad or iOS devices using the Safari browser.

However, there are some possible solutions to resolve this “about invalid zClosurez” on your iOS devices to be able to access the service using the Safari browser.

How to Fix “about invalid zClosurez” error

If you are experiencing Gmail about invalid zClosurez on your iPhone on the Safari browser, here is what to do to fix it.

  • Clear the Safari Browser Caches and Cookies.
  • Close all opened tabs on your Safari browser.
  • Turn on and turn off the iPhone airplane mode.
  • Update your iPhone to the latest iOS.
  • Reset your iPhone network settings.
  • Clear Gmail Captcha for Gmail Account

These are the steps we undergo to clear off the about:invalid Safari browser zClosurez on our iPhone.

How to Clear Caches and Cookies on Safari

We share below the steps to clear all stored coaches and cookies on the Safari browser on iPhone/iPad.about:invalid#zClosurez

  • Go to your iPhone settings.
  • Tap on the “Safari” browser.
  • Click on “Advanced.”
  • Click “Website Data.”
  • Click on “Remove all website data.”
  • Done.

These steps will not remove your browser’s search history. To remove all search history, follow the procedures below.

  • Go to your iPhone settings.
  • Click on “Safari.”
  • Click on clear “History and Website Data.”
  • Done.

If you have autofill information on your Safari browser, it’ll not be cleared.

Close all Opened Tabs on your Safari Browser

If the above steps didn’t clear the about:invalid#zClosurez on your iPhone Safari URL. Closing all opened tabs could also help.

  • Open the Safari browser on your iPhone by clicking on the browser’s icon.
  • Press and hold the (long) tab donated by two squares.
  • Click on “Close all tabs.”

The all tabs button is located at the bottom right on your iPhone screen.

Turn on and Turn off Airplane Mode

This only takes a few seconds. Turn on the airplane mode on your iPhone, wait for some seconds, 1-2 minutes at max, and turn off the airplane mode.about invalid zClosurez airplane mode

  • From the iPhone’s home screen, swipe up from the bottom of the screen or swipe down from the top-right of the screen (iPhone X or higher).
  • Click on the airplane icon to turn Airplane Mode on or off.
  • The orange icon indicated that the airplane mode had been enabled.

Alternatively, here is how to enable and disable the airplane mode on your iPhone.

  • Access the Settings utility on your iPhone.
  • Go to Settings screen >> Toggle switch to the right of the Airplane Mode option to turn it on or off.

Update your iPhone to the latest iOS

Updating your iPhone OS to the latest version will equally update the Safari browser to the latest. Reason being that the safari browser is a preinstalled browser on your iPhone.


  • Go to your iPhone settings.
  • Click on “General.”
  • Tap on the “Software Update.”
  • Click on “Download and Install.”
  • Enter your passcode IF you are asked to.

You can also set up or customize your iPhone to automatically update iPhone OS when a new update is available.

Reset your iPhone Network Settings

You can also resort to resetting your iPhone network settings to fix the Safari about:invalid#zClosure error on your iPhone.Reset Network Settings

  • Go to your iPhone Settings.
  • Click on the “General” tab.
  • Tap “Reset.”
  • Tap “Reset Network Settings.”
  • Done.

Resetting network settings on your iPhone also reset preset WiFi password, cellular settings, all APN, and VPN settings you have previously preconfigured on your iPhone.

Clear Gmail Captcha for Gmail Account

Follow the links below to clear Gmail captcha for your Gmail account as well as your domain.

  • or
  • Google Apps For Your Domain account: (make sure that you replace with your real domain name)

Leave a Comment