I am trying to sync my contacts between my ios devices (icloud) and zoho but all I get on my ios device is :Cannot Connect using SSL”.

I have switched off 2FA and tried a password in Application passwords but no change.

ios 14.4

I am trying out Zoho for my company and carddav and carddav are important to our operation.

Can anyone assist?

Is anyone else experiencing this issue?

Am I doing something incorrectly?

Regardxs