I've just tested the plugin on my Arch Linux machine with the latest JRE, and it worked fine.
Since the plugin comes with Writer2LaTeX
1.6.0, maybe replacing
writer2latex.jar with the Writer2LaTeX
1.6.1 .jar file might help.
You can check which version is installed by looking at the HTML source code of converted .odt files.
If it doesn't say
Writer2xhtml ver. 1.6.1., you're still using Writer2LaTeX 1.6.0.
(You can download Writer2LaTeX 1.6.1 from the
author's website.)
Please note that the 1.9.x versions don't support .epub output and can't be used with this plugin.
If replacing Writer2LaTeX 1.6.0 with Writer2LaTeX 1.6.1 didn't help, you might have to upgrade/downgrade JRE/Java.
It also couldn't hurt to save your .odt file as a .docx file and then save it as an .odt file again.