Invalid VCalendar - ATTACH;VALUE=TEXT:file:

Upgrading to 2.19.1 from 2.18, I started receiving 403 Forbidden from Fastmail CalDAV when adding events. With debug logging I can see Fastmail is objecting to:

ATTACH;VALUE=TEXT:file:

Response:

<D:responsedescription>Invalid VALUE type for property ATTACH: VALUE=TEXT</D:responsedescription>

Looking at the RFC I would tend to agree with Fastmail.

I have downgraded to 2.18 and seems fine again now.

Yep, it should not be TEXT value. I’ll fix that.