danted.service: Can't open PID file /var/run/danted.pid (yet?) after start: No such file or directory

Hello Community,
maybe someone can help us?
After the upgrade of an Ubuntu 16.04 LTS to Ubuntu 18.04 LTS, running on the SQUID and Dante server, the Danted spins around. If the danted per systemctl is started then this "danted.service reports: Can not open PID file /var/run/danted.pid (yet?) After start: No such file or directory"
If the pid file is removed and the Dante server is started via /etc/init.d/ then the file is created and there are no negative entries in the logs. Also, the Dante behaves as required at both systemctl and /etc/init.d. Do you have any ideas?
To our system:
Linux server 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

danted.conf:
logoutput: /var/log/danted.log

internal: eth0 port = 1080
internal: 127.0.0.1 port = 1080

external: eth0

method: none
clientmethod: none

user.libwrap: proxy

resolveprotocol: udp

client pass {
 from: 10.0.0.0/8 to: 10.x.x.x/32
 log: connect error
}

client block {
 from: 0.0.0.0/0 to: 0.0.0.0/0
 log: error
}

pass {
 from: 10.0.0.0/8 to: 0.0.0.0/0
 protocol: tcp udp
 command: bind connect udpassociate bindreply udpreply
 log: connect disconnect error iooperation
}

block {
 from: 0.0.0.0/0 to: 127.0.0.1/32
 log: connect error
}

block {
 from: 0.0.0.0/0 to: 192.168.0.0/24
 log: connect error
}

block {
 from: 0.0.0.0/0 to: 172.16.0.0/16
 log: connect error
}

block {
 from: 0.0.0.0/0 to: 10.0.0.0/8
 log: connect error
}

block {
 from: 0.0.0.0/0 to: 0.0.0.0/0
 log: connect error
}

I would be glad to receive your feedback and wish everyone a relaxing day.