Easy!Appointments CalDAV broken

What app is this about, and its version: Easy!Appointments v 1.6ynh1
What YunoHost version are you running: 12.1.40.1
What type of hardware are you using: Old laptop or computer

Describe your issue

upgraded the easy appointments app and unfortunately calDAV sync no longer sees my nextcloud server, ironically run on the same machine. “could not establish server connection”. is there a way to revert the version without losing data since? if i can revert but only with data loss, that’s a better option than having the app not work at all

Share relevant logs or error messages

none

apparently a setting needs changed in github, is there a way i or the package package manager can do that?

@meow
Did you try this, according to the given fix ?

sudo nano /var/www/easyappointments/application/libraries/Caldav_sync.php
# change, line 29
class Caldav_sync
{
    // Toggle SSRF host validation here (enabled by default).
    protected bool $enable_ssrf_check = true;

# to
class Caldav_sync
{
    // Toggle SSRF host validation here (enabled by default).
    protected bool $enable_ssrf_check = false;