iOS – Entry the Google calendar from an iPhone utilizing Caldav

I want to entry a Google calendar via a Caldav account. I’ve been doing this efficiently for a number of years, however this week immediately stopped working. I assumed originally that (a) in some way expired my password of my utility, or (b) there was some kind of group coverage change that prevented entry to Caldav, however experimented with curl Present that this works properly:

curl -X PROPFIND -u "..." 
  https://www.google.com/calendar/dav/mepercent40example.com/person

This returns a profitable response from Caldav:

 
  /calendar/dav/mepercent40example.com/person
  
   HTTP/1.1 200 OK
   
    Lars KS
    
     
     
    
   
  
 

And operating:

curl -X PROPFIND -u "..." -H Depth:1 
  https://www.google.com/calendar/dav/mepercent40example.com/occasions/

It appears to efficiently entry calendar occasions; Returns greater than 45000 strains of responses which are seen

 /calendar/dav/mepercent40example.com/occasions/11223344-6819-427c-9ee0-ccd8642b1a96.ics
 
  HTTP/1.1 200 OK
  
   textual content/calendar; element=vevent
   "63566811207"
   
  
 

Glorious! But when I enter the configuration of the accounts on my iPhone and add a brand new Caldav account, to have:

Each time I click on on “Prepared”, flip a bit after which inform:

CalDAV account verification failed

What may very well be failing right here? URL and credentials coincide with what I’m efficiently utilizing with curl.