Please perform the update as follows.
Web Browser Version
No update operation is required on your end.
Mobile App (iOS)
Please update via the App Store app.
Your company may have restrictions on app updates.
If you are unable to update via the App Store app, please check with your company's Administrator.
App Store
https://apps.apple.com/jp/app/teachme-biz/id683050928
Mobile App (Android)
Please update via the Google Play Store app.
Your company may have restrictions on app updates.
If you are unable to update via the Google Play Store app, please check with your company's Administrator.
Google Play Store
https://play.google.com/store/apps/details?id=jp.studist.teachme_biz