conf/users.auth.php must be writable. "Check the permissions of the file conf/users.auth.php. It needs to be writable for your webserver." https://www.dokuwiki.org/plugin:usermanager Reproducible: Always
This should also be writable for editing ACLs in the web interface: conf/acl.auth.php
How did you install dokuwiki? Here's what I got on my install (USE="vhosts"): ls -la <vhost>/htdocs-secure/dokuwiki/conf/ total 112 drwxrwxr-x 2 root apache 4096 Jun 2 19:23 . drwxr-xr-x 6 root root 4096 Jun 2 19:23 .. -rw-r--r-- 1 apache apache 229 Set 12 2013 acl.auth.php -rw-r--r-- 1 root root 448 Jun 2 19:23 acl.auth.php.dist -rw-r--r-- 1 root root 2021 Jun 2 19:23 acronyms.conf -rw-r--r-- 1 root root 12161 Jun 2 19:23 dokuwiki.php -rw-r--r-- 1 root root 354 Jun 2 19:23 entities.conf -rw-r--r-- 1 root root 87 Dez 23 17:46 .htaccess -rw-r--r-- 1 root root 1623 Jun 2 19:23 interwiki.conf -rw-r--r-- 1 root root 1208 Jun 2 19:23 license.php -rw-r--r-- 1 apache apache 967 Set 20 2013 local.php -rw-r--r-- 1 apache apache 708 Set 13 2013 local.php.bak -rw-r--r-- 1 root root 462 Jun 2 19:23 local.php.dist -rw-r--r-- 1 root root 2572 Jun 2 19:23 mediameta.php -rw-r--r-- 1 root root 2170 Jun 2 19:23 mime.conf -rw-r--r-- 1 root root 11391 Jun 2 19:23 mysql.conf.php.example -rw-r--r-- 1 apache apache 242 Set 12 2013 plugins.local.php -rw-r--r-- 1 root root 173 Jun 2 19:23 plugins.php -rw-r--r-- 1 root root 552 Jun 2 19:23 plugins.required.php -rw-r--r-- 1 root root 105 Jun 2 19:23 scheme.conf -rw-r--r-- 1 root root 748 Jun 2 19:23 smileys.conf -rw-r--r-- 1 apache apache 261 Set 12 2013 users.auth.php -rw-r--r-- 1 root root 153 Jun 2 19:23 users.auth.php.dist -rw-r--r-- 1 root root 1729 Jun 2 19:23 wordblock.conf conf/users.auth.php and conf/acl.auth.php are owned and writable by apache.
