Don't start the interface

Felipe Gustavo Braga <[email protected]> Tue, 8 Sep 2020 06:58:19 -0700 (PDT)
Newsgroups gmane.comp.java.robocode
Message-ID <[email protected]>
I'm trying to execute 1.9.3.9 robocode, but after installation, I run:
cd robocode
./robocode.sh 
and I got this message and never progress from this...

Loaded net.sf.robocode.api
Loaded net.sf.robocode.core
Loading plugins from /home/felipe/robocode/libs
Loaded net.sf.robocode.ui
Loaded net.sf.robocode.battle
Loaded net.sf.robocode.host
Loaded net.sf.robocode.ui.editor
Loaded net.sf.robocode.sound
Loaded net.sf.robocode.repository
Initializing version check date.
Reading robot database

I'm using Ubuntu 20.04 LTS and oh my zsh as terminal
and jdk8

The interface flashes on screen for a moment
PORTUGUÊS
INGLÊS
ESPANHOL
25/5000
the interface flashes on the screen

PORTUGUÊS
INGLÊS
ESPANHOL
25/5000
the interface flashes on the screen

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