mount.cifs fails with mount error(2): No such file or directory

Mounting a samba share (from linux samba server) is not possible from shell on fresh kubuntu 19.04 installation

root@client:~# mount -t cifs -o user=myuser //myserver/myshare /home/user/myserver/myshare/ Password for myuser@//myserver/myshare:  ***** mount error(2): No such file or directory Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) 

But the share, mountpoint and user (credentials) exist and are correct:

smbclient -L myserver -U mygroup\myuser Enter MYGROUP\MYUSER's password:       Sharename       Type      Comment     ---------       ----      -------     myshare         Disk           [...]  ~# ls -al /home/user/myserver/myshare/ insgesamt 8 drwxrwxrwx 2 user user 4096 Jul 30 19:21 . drwxrwxr-x 3 user user 4096 Jul 30 19:21 .. 

I can also open the share in e.g. dolphin with smb:// protocol This used to work for years now with previous ubuntu versions.

client system:

~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:    Ubuntu 19.04 Release:        19.04 Codename:       disco  ~# uname -a Linux mypc 5.0.0-21-generic #22-Ubuntu SMP Tue Jul 2 13:27:33 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux 

installed packages (from apt log):

install cifs-utils:amd64 <keine> 2:6.8-2 install keyutils:amd64 <keine> 1.6-6 install samba-common:all <none> 2:4.10.0+dfsg-0ubuntu2.2 install smbclient:amd64 <keine> 2:4.10.0+dfsg-0ubuntu2.2 

Server samba version:

~# smbd --version Version 3.6.25