installation problem

hello,
Thanks for the work on deepfigure_open.
I have an installation problem when i try to install it on a virtual machine
The sbt assembly state return this output
[error] /home/opencv/pdffigures2/src/main/scala/org/allenai/pdffigures2/VisualLogger.scala:173:45: value EXIT_ON_CLOSE is not a member of object javax.swing.JFrame
[error] frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
[error] ^
[error] one error found
[error] (Compile / compileIncremental) Compilation failed

and my system is :
Openjdk 11.0.5 2019-10-15
OpenJDK Runtime Environment (build 11.0.5+10-post-Ubuntu-0ubuntu1.118.04)
OpenJDK 64-Bit Server VM (build 11.0.5+10-post-Ubuntu-0ubuntu1.118.04, mixed mode, sharing)

Maybe you can help me to figure what's wrong .
thanks for your help