An error occured while decoding an iCalendar (ics) file as UTF-8. Check that the file, including symbols and accented letters, is encoded using the UTF-8 character encoding.
Bu gwall wrth geisio dadgodio ffeil iCalendr (ics) fel UTF-8. Gwiriwch fod y ffeil, gan gynnwys symbolau a nodau gydag acenion, wedi'i hamgodio gan ddefnyddio amgodiad nod UTF-8.