Strange Java Issue

Update

See below for the solution. Spoiler – It’s a typo.

Back in April 2020, I wrote a little program to run a sequence of LibreOffice Impress Slide shows. For ease of deployment on Windows and Linux, I built the program in Java. And it worked just fine. Here’s what the program looks like:

You can follow the whole Saga of its development using this link. The program has been working very well on Linux Mint 19 and 20 and Windows 10 for a couple of months now. I’ve not changed anything since May 16. Here’s the github repository.

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