can't sync with caldav

Hello

I'm trying to sync with caldav. Using the endpoint: https://calendar.zoho.com/caldav, I can get the principal.

Then when I try to get calendar-home-set from the principal, the reply is empty.

I'm sending the following PROPFIND request to: https://calendar.zoho.com/caldav/67.....a3/user

<propfind xmlns="DAV:">
<prop>
<calendar-home-set xmlns="urn:ietf:params:xml:ns:caldav"/>
</prop>
</propfind>

The reply is successful but empty:

<D:multistatus xmlns:D="DAV:"/>

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