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[GH-ISSUE #6702] 502 Bad Gateway after update from 1.34.3 -> 1.35.2 #15302
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Originally created by @Kevin-bk-ops on GitHub (Jan 13, 2026).
Original GitHub issue: https://github.com/dani-garcia/vaultwarden/issues/6702
Prerequisites
Vaultwarden Support String
Your environment (Generated via diagnostics page)
Config & Details (Generated via diagnostics page)
Show Config & Details
Environment settings which are overridden: SIGNUPS_ALLOWED, INVITATIONS_ALLOWED, SHOW_PASSWORD_HINT, ADMIN_TOKEN
Config:
Vaultwarden Build Version
v1.34.3
Deployment method
Official Container Image
Custom deployment method
Deployed with Portainer
Reverse Proxy
NGINX v2.13.5
Host/Server Operating System
Linux
Operating System Version
Ubuntu 24.04.3 LTS
Clients
Web Vault
Client Version
v2025.7.0
Steps To Reproduce
Expected Result
Normal start of Vaultwarden
Actual Result
502 Bad Gateway openresty on Web Vault and Admin Panel
Logs
Screenshots or Videos
Additional Context
No response
@stefan0xC commented on GitHub (Jan 13, 2026):
What do the logs say?
@Kevin-bk-ops commented on GitHub (Jan 13, 2026):
Where I find the logs in portainer? Can't find it..
Configuration in the docker compose file:
@stefan0xC commented on GitHub (Jan 13, 2026):
I'm not using Portainer, so can't help with that. But you can also configure a
LOG_FILE(the path should be from the containers view, like/data/vaultwarden.log).4352fffeec/.env.template (L402)Since you are using MariaDB my guess is that this is a duplicate of https://github.com/dani-garcia/vaultwarden/issues/6611 and https://github.com/dani-garcia/vaultwarden/issues/6602#issuecomment-3694436267