Hey @AndreyB ,
Do you get something more, or only this message you did report? I’m seeing that based on your message it may be related with this: Zone_rules_exception "Unknown time-zone ID: Browser" on Kibana - #4 by GezimSejdiu – but not sure if that is the case.
Feel free to also comment on the GitHub issue: https://github.com/opensearch-project/sql/issues/18 if that does happen again.
In my case, a hard refresh of the page does work sometimes.
Best regards,