[horde] CardDAV not working on iPhone (follow up)

[INFO - Digital Style Informatica]

CardDAV not working on iPhone (follow up)

When I put my subscription address on IOS 12 and Horde 5.2.22 it says 
"the CalDAV account cannot be verified"
on configuration saved it change address removing the part after domain 
i.e. "www.test.com" instead of 
"www.test.com/SubscriptionInformationRemovedOnSave"

I do not use SSL, is it necessary?

Any ideas? No one use CardDAV on iPhone?

Thank you.


Regards