"Couldn't parse iCalendar object" error message

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Dear Team,
I do know that this is a bug from Apple. But unfortunately, I cannot resolve it by emailing them or whatever (it was not my decision to go with a big SV company).

Upon parsing the next line of X-APPLE-STRUCTURED-LOCATION
Error:
Error at line 3,736: Expected [61], read [58]
i.e at
“t\n10116 Offenbach am Main”

Somehow thunderbird display this event properly (but my thunderbird is read-only).

Inside apple-calendar (both desktop app and WWW) this event does NOT exist. Otherwise I would delete it.

Is there any workaround (other than me deleting this calendar)?
Thanks for supporting open source!

BEGIN:VEVENT
DTEND;TZID=Europe/Berlin:20171127T153000
UID:73BGAFCB-E708-4720-97EB-E85D715E16CD
DTSTAMP:20171031T140858Z
LOCATION:Goethe Str. 9\; Wis\n10116 Offenbach am Main  |  GERMA
 NY
URL;VALUE=URI:message:%3C11bf01b45177$8b533300$a1f98800$@am.uni-mainz
 .de%3E
SEQUENCE:0
SUMMARY:Hochschullehrer-Treffen
DTSTART;TZID=Europe/Berlin:20171127T140000
CREATED:20171031T140815Z
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-TITLE=Max-von-Laue-Str. 9; Dekana
 t\n10116 Offenbach am Main  |  GERMANY:geo:50.373850,8.478694
END:VEVENT

@Herman-Cox said in "Couldn't parse iCalendar object" error message:

Hochschullehrer-Treffen

If thunderbird displays the above event try to delete that event there and trigger a sync. Otherwise - if you don’t have real access to your data on a file basis - you can export the calendar into a file, delete that event manually in a text editor and import the data again ino a new calendar.

Hm, I guess the problem is the unescaped ; in the X-APPLE-STRUCTURED-LOCATION line. I don’t think there is an easy way to work around that. Creating a new calendar without that event like suggested by @devvv4ever is probably the best solution.