Hello,
Overview:
i did a new installation of nextcloud 27 to my webspace. (Ionos.de)
All working fine with one exception.
Sharing of calendars is not possible. In the window where you define the share there is a message saying that there aren no groups and users. Share-Api is enabled.
Am I missing a particular app?
[/details]
- version: 27.0.2.1
- versionstring: 27.0.2
PHP version 8.1.22
MySQL Database
Linux 4.4.302-icpu-092 x86_64
The issue you are facing:
Users show not, when calendar share is defined

Is this the first time you’ve seen this error? (Y):
The output of your Nextcloud log in Admin > Logging:
There is no output after trying to create sharing
The output of your config.php file in /path/to/nextcloud
(make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'this is secret...',
'passwordsalt' => 'this is secret...',
'secret' => 'this is secret...',
'trusted_domains' =>
array (
0 => 'this is secret...',
),
'datadirectory' => '/this is secret...',
'dbtype' => 'mysql',
'version' => '27.0.2.1',
'overwrite.cli.url' => 'this is secret...',
'dbname' => 'this is secret...',
'dbhost' => 'this is secret...',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'this is secret...',
'dbpassword' => 'this is secret...',
'installed' => true,
'maintenance' => false,
'mail_smtpmode' => 'smtp',
'mail_smtpauth' => 1,
'mail_sendmailmode' => 'smtp',
'mail_smtphost' => 'this is secret...',
'mail_from_address' => 'this is secret...',
'mail_domain' => 'this is secret...',
'mail_smtpport' => '993',
'mail_smtpname' => 'this is secret...',
'mail_smtppassword' => 'this is secret...',
'mail_smtpsecure' => 'ssl',
);