kdepim 5.2.3 Error

Hello,

i am using debian 9 but akonadi is not working properly.
so i want to add new repositories in synaptic so i can get a current kdepim with Akonadi.
Attached below is the error report of my Dell Vostro notebook with 16GB RAM and 500GB 
HDD.
Many thanks for your help
Ralph

root@deb9:/home/Name# pimsettingexporter
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
log_kidentitymanagement: IdentityManager: There was no default identity. Marking first 
one as default.
Connecting to deprecated signal 
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
akonadiprivate_log: search paths: ("/usr/local/sbin", "/usr/local/bin", "/usr/sbin", "/usr/bin", "/
sbin", "/bin", "/usr/sbin", "/usr/local/sbin", "/usr/local/libexec", "/usr/libexec", "/opt/mysql/
libexec", "/opt/local/lib/mysql5/bin", "/opt/mysql/sbin")
Found mysql_install_db: "/usr/bin/mysql_install_db"
Found mysqlcheck: "/usr/bin/mysqlcheck"
Using mysqld: "/usr/sbin/mysqld-akonadi"
QSystemTrayIcon::setVisible: No Icon set
akonadicore_log: Socket error occurred: "QLocalSocket::connectToServer: Ungültiger Name"
akonadicore_log: Socket error occurred: "QLocalSocket::connectToServer: Ungültiger Name"
org.kde.akonadi.ETM: GEN true false false
org.kde.akonadi.ETM: collection: QVector()
org.kde.akonadi.ETM: 
mysqld reports version 10.1.26 (MariaDB)
Executing: "/usr/bin/mysql_install_db" "--defaults-file=/etc/xdg/akonadi/mysql-global.conf --
force --datadir=/root/.local/share/akonadi/db_data/"


FATAL ERROR: Could not find /usr/bin/my_print_defaults


If you compiled from source, you need to either run 'make install' to
copy the software into the correct location ready for operation.
If you don't want to do a full install, you can use the --srcddir
option to only install the mysql database and privilege tables


If you are using a binary release, you must either be at the top
level of the extracted archive, or pass the --basedir option
pointing to that location.


The latest information about mysql_install_db is available at
https://mariadb.com/kb/en/installing-system-tables-mysql_install_db
Executing: "/usr/sbin/mysqld-akonadi" "--defaults-file=/root/.local/share/akonadi/
mysql.conf --datadir=/root/.local/share/akonadi/db_data/ --socket=/tmp/akonadi-
root.VA0lW2/mysql.socket"
Database process exited unexpectedly during initial connection!
executable: "/usr/sbin/mysqld-akonadi"
arguments: ("--defaults-file=/root/.local/share/akonadi/mysql.conf", "--datadir=/root/.local/
share/akonadi/db_data/", "--socket=/tmp/akonadi-root.VA0lW2/mysql.socket")
stdout: ""
stderr: "2018-03-15 14:36:10 3071059968 [Note] /usr/sbin/mysqld (mysqld 10.1.26-
MariaDB-0+deb9u1) starting as process 1752 ...\n/usr/sbin/mysqld: 


Please consult the Knowledge Base to find out how to run mysqld as root!\n2018-03-15 
14:36:10 3071059968 [ERROR] 


Aborting\n\n"
exit code: 1
process error: "Unknown error"
terminating service threads
terminating connection threads
stopping db process
Failed to remove Unix socket
Failed to remove runtime connection config file
Application 'akonadiserver' exited normally...
log_mailcommon: failed to retrieve tags "Unbekannter Fehler."
akonadicore_log: Job error: "Unbekannter Fehler." for collection: QVector() 


akonadicore_log: Job error: "Unbekannter Fehler." for collection: QVector()