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Sorry to hear you’re facing problems 
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Server configuration detail
Operating system: Linux 5.15.16-200.fc35.x86_64 #1 SMP Thu Jan 20 15:38:18 UTC 2022 x86_64
Webserver: Apache/2.4.51 (Debian) (apache2handler)
Database: mysql 10.5.13
PHP version: 8.0.15
Modules loaded: Core, date, libxml, openssl, pcre, sqlite3, zlib, ctype, curl, dom, fileinfo, filter, ftp, hash, iconv, json, mbstring, SPL, PDO, pdo_sqlite, session, posix, Reflection, standard, SimpleXML, Phar, tokenizer, xml, xmlreader, xmlwriter, mysqlnd, apache2handler, apcu, bcmath, exif, gd, gmp, imagick, intl, ldap, memcached, pcntl, pdo_mysql, pdo_pgsql, redis, sodium, zip, Zend OPcache
Nextcloud version: 23.0.0 - 23.0.0.10
The issue you are facing:
system is not sorting using Slovak alphabet. find attached picture, where character Ľ is between M and M
Is this the first time you’ve seen this error? (Y/N): from beginning
Steps to replicate it:
- for example open users view