error: 'invalid_grant'

[baek-sang]

Steps To Reproduce

1. Execute Bitwarden-Portable
2. Login and vault lock
3. After a certain amount of time passes, the user gets logged out when reopening the app.

Expected Result

DO NOT LOGOUT SESSION

Actual Result

logout

Screenshots or Videos

No response

Additional Context

app.log

[2026-03-24 05:20:09.956] [error] Error refreshing access token:  { response: { error: 'invalid_grant' }, statusCode: 400 }

bitwarden self-host v2026.3.0
The password was not changed, and TOTP, keys, or other settings were also not modified. All settings remain the same.

Operating System

Windows

Operating System Version

Windows 11 25H2

Installation method

Other, Direct Download (from bitwarden.com)

Build Version

Bitwarden-Portable-2026.2.1

Issue Tracking Info

• I understand that work is tracked outside of GitHub. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

[bitwarden-bot]

Thank you for reporting this issue! We've added this to our internal tracking system.
ID: PM-34019
Link (for internal use): https://bitwarden.atlassian.net/browse/PM-34019

[rmcdowell-bitwarden]

Hi there,

I am unable to reproduce this issue, it has been escalated for further investigation. If you have more information that can help us, please add it below.

Thanks!

[trmartin4]

@baek-sang how long were you waiting with the application locked? The refresh token has a 30-day lifetime, and waiting longer than that will invalidate the session.

Also, is this a one-time event, or does it occur with frequency?