error in make.socket

[mvanrijn]

text = c("Mijn kat Toby heeft nooit van andere katten gehouden.",
"Maar andere katjes houden wel van hem!")
tokens = call_frog(text, host="localhost", port=9772, verbose = T)

I get the following error:
Error in make.socket(host, port) : socket not established

How can I solve this?
The port is correct. How can I check the host?

I believe my installation and preprocessing was correct:
vagrant@stable:$ sudo apt-get install frog frogdata ucto
Reading package lists... Done
Building dependency tree
Reading state information... Done
frog is already the newest version (0.15-1).
frogdata is already the newest version (0.16-1).
ucto is already the newest version (0.14-2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
vagrant@stable:$ frog -S 9772
frog 0.20.1 (c) CLTS, ILK 1998 - 2020
CLST - Centre for Language and Speech Technology,Radboud University
ILK - Induction of Linguistic Knowledge Research Group,Tilburg University
based on [ucto 0.21.1, libfolia 2.4, timbl 6.5, ticcutils 0.24, mbt 3.6]
removing old debug files using: 'find frog.*.debug -mtime +1 -exec rm {} ;'
frog-:config read from: /usr/local/share/frog/nld/frog.cfg
frog-:configuration version = 0.12
ucto: textcat configured from: /usr/local/share/ucto/textcat.cfg
frog-tagger-tagger-:reading subsets from /usr/local/share/frog/nld//subsets.cgn
frog-tagger-tagger-:reading constraints from /usr/local/share/frog/nld//constraints.cgn
Segmentation fault