Hi all and thanks in advance. When accepting an appointment/import ics I get the error in the error console ''Calendar: Couldn't find Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna'' The meeting is sended from Outlook for Mac. I use Thunderbird 91 on Ubuntu 20.04 Content of the ics file: BEGIN:VTIMEZONE TZID:Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna X-ENTOURAGE-CFTIMEZONE:Europe/Amsterdam X-ENTOURAGE-TZID:9 BEGIN:STANDARD My current time zone in the setting is: Europe/Amsterdam Any suggestions to be able to accept the meeting? Cheers!