Not sure if related but according to https://www.collaboraoffice.com/code-22-05-release-notes/ in CODE 22.05.10 , "Timezone support
Now we have internal support for respecting the client’s time zone. There were some operations, e.g. “Insert – Time” when the users expected their time, not the server’s time, and now this has been addressed."
The error you got displayed is from the BigBlueButton Server and not the Greenlight directly.
So maybe something went wrong when creating the room via the API.
@mave most likely an upstream bug. I assume you mean that you set DEFAULT_LOCALE=de and then everything is german but that specific text.
For example, I posted a screenshot at https://github.com/bigbluebutton/greenlight/issues/5583 for missing email translation. Maybe you can open a bug report with a screenshot upstream
I don't know the reason after an update from V3 0.4.0 to 0.5.0 package no BBB-Meetings starts. Error was in Greenlight GUI only short, didn't know if there is a logging reachable ...
But I installed V3 completely new and now it runs again without this error.