Unable to log in or submit data

If you experience issues on our site such as being unable to log in, unable to submit data, buttons not responding, or pages not displaying correctly, the cause is usually your browser or network environment and can be resolved with the steps below. Please try them in order.

1. Things to try first

  • Reload the page: Click your browser's refresh button, or force-reload with Ctrl + F5 (Mac: Command + Shift + R).
  • Log in again: (If you are logged in) log out once, then log in again.
  • Check your ID and password: Make sure capitalization is correct and there are no extra spaces before or after. If you have forgotten your password, log in with a one-time verification code and reset your password.

2. Clear your browser's cache and cookies

Old data stored in your browser (cache and cookies) can cause login or display problems. Please clear your browser's cache and cookies, then try accessing the site again.

For instructions, please refer to each browser's official guide.

Note: Deleting cookies may log you out of this and other websites and may remove saved form data. Please make a note of any IDs and passwords you need beforehand.

3. Try private (incognito) mode

If you would like to identify the cause without clearing your cache, you can also try accessing the site in private mode ("Incognito window" in Chrome, "Private Browsing" in Safari, "InPrivate window" in Edge). If the site works normally in private mode, the cause is most likely your cache/cookies or a browser extension.

4. Try a different browser

The issue may be specific to your browser. Please try accessing the site with a different browser (for example, Chrome if you normally use Safari).

An outdated browser version can also cause problems, so we recommend updating to the latest version.

5. Try a different device

If it does not work on your smartphone, try a PC or tablet; if it does not work on your PC, try a smartphone. If the site works normally on another device, the cause may lie in the original device's environment (browser settings, security software, etc.).

An outdated operating system may also prevent the site from working properly. Please update to the latest OS or try accessing from another device.

6. Try a different network

Your network connection may be the cause. Please try switching your connection as follows.

  • If you are using Wi-Fi → switch to a mobile network (4G/5G)
  • If you are using a mobile network → switch to Wi-Fi
  • If you are on a company or school network → security settings may be restricting the connection, so please try a different network
  • If you are using a VPN → temporarily turn the VPN off and try again

7. If the issue persists

If none of the above resolves the issue, please contact our Customer Concierge. Providing the following information will help us investigate more quickly.

  • A description of the issue (e.g., nothing happens when I click the login button)
  • Any error message displayed (a screenshot if possible)
  • The date and time it occurred
  • Your device (e.g., iPhone 15, Windows PC)
  • Your browser and its version (e.g., Chrome, Safari)
  • Which of the steps above you have already tried