After upgrading to discourse 3.. can only access to admin using safe-mode

[Stephen]

There’s a good topic here explaining where you can find most everything:

Where does Discourse store and show logs?

When troubleshooting issues or errors with Discourse it is important you look at your logs. Here’s a listing of where they are and what’s in there. Your site domain Administration logs shown in the UI The Discourse admin panel contains several forms of logging: Emails that are sent, skipped, bounced, received and rejected are logged at https://=DOMAIN=/admin/email/sent and the neighboring tabs. Staff actions are logged at https://=DOMAIN=/admin/logs/staff_action_logs Email addresses and …