Hi,could you help me please ?

i'm on Zimbra hosted FREE.fr and here is the answer when i want to delete an event on my

calendar:

Une erreur réseau s'est produite.
method: CancelAppointmentRequest
msg: system failure: java.lang.ClassCastException: javax.mail.internet.MimeMessage
code: service.FAILURE
detail: soap:Receiver
trace: btpool0-2377:1237614513218:2937c5d0deba509e
request:

*****@free.fr0_8b0d49e39216cd1b35100b40717bfb25471 8f319_69643d33363a61666361383663312d656336642d3

43061372d613365382d3431633162646562636264643b65787 03d31333a313233373738373038323431373b747970653d

363a7a696d6272613bAnnulé: JKJHH
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color: #000000;">ghjthjgjdtjdg</div></body></html></body></html>