Agenda can't be found when I try to create Caldav agenda in Thunderbird

Agenda can't be found when I try to create Caldav agenda in Thunderbird

Hello there,

I did everything explained here

https://help.zoho.com/portal/en/kb/calendar/syncing-other-calendars/articles/setting-up-caldav-sync-in-zoho-calendar#CalDAV_sync_for_Thunderbird_Lightning

But when I fill informations, it says that no calendar is available at the adress !