Caldav problem with ios 13


I have a problem to sync my calendar to my iphone XR.

I have iOs 13.3.1, I add my caldav as a new account. The verification is ok but when I go to my calendar app, it says that it’s impossible to connect to the acount.

Do you know where this problem come from ?


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Thank, I saw that topic but I don’t understand I make a certificat with let’s encrypt so it must work no ?

My account is validate at first step, no SSL error message.

I just tried and contact sync well with my server.

Nobody have this problem on ios 13 ?