> For the complete documentation index, see [llms.txt](https://help.getupnote.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.getupnote.com/resources/troubleshoot-issues/cant-sign-in-to-account.md). # Can't sign in to account There are a few common reasons a login may not go through. Review the situations below and follow the steps that match what you’re experiencing to quickly regain access to your account. ### If you see the error message: `Request failed with status code 400: POST` [`https://us-central1-get-senna.cloudfunctions.net/createACToken`](https://us-central1-get-senna.cloudfunctions.net/createACToken) Our server is experiencing high load due to a large number of requests, which caused sign-in issues. We're continuing to improve the service and hope to fully resolve this issue within the next few weeks. If you experience sign-in issues again during this period, **please try signing in again a few hours later (or after 7:00 AM UTC), as the service is expected to recover by then.** You can also continue using UpNote while you're signed out. Any notes that aren't synced will be saved locally and will automatically sync to the server after you sign in again. ### If you see the error message: `Error (auth/firebase-app-check-token-is-invalid)` If you see this error when signing in, please update your app to the latest version and try again. Go to **Settings > Help > Check for updates** to update the app, or follow the links below: * [Windows - Microsoft Store](https://www.microsoft.com/en-us/p/upnote/9mv7690m8f5n?activetab=pivot:overviewtab) * [Windows - installer](https://download.getupnote.com/app/UpNote%20Setup.exe) * [Mac](https://itunes.apple.com/us/app/upnote-an-elegant-note-app/id1398373917?ls=1\&mt=12) If you have more than one UpNote installation on your device, please remove all versions and reinstall a single copy to ensure everything works properly. ### Unable to sign in with Google or Apple Try hovering over the “Sign in with Google/Apple" button and clicking the pop-out icon to open the link in your browser to sign in.
### Forgot password * Follow [this guide](/get-started/manage-your-account/reset-password.md) to reset your password. * If you don’t see the password reset email, please make sure you’re using the latest version of UpNote and check your mailbox’s spam or junk folder. *** Still need help? [Contact us](/resources/contact-us.md) and we’ll assist you further.