mac calendar cannot connect cosmo server

my calendar url: https://94ee-180-158-242-11.ngrok-free.app/dav/xxxx@xxx.com/calendar/

this url used of Thunderbird is well , but in my mac calendar is not well , Please give me some help, what should I do?

[f1-outsourcing]

my calendar url: https://94ee-180-158-242-11.ngrok-free.app/dav/xxxx@xxx.com/calendar/

this url used of Thunderbird is well , but in my mac calendar is not well , Please give me some help, what should I do?

Maybe check your logs. I have also checked with the macos client, and that went fine.