java.util.NoSuchElementException: No value present

java.util.NoSuchElementException: No value present
at java.util.Optional.get(Unknown Source) ~[?:1.8.0_131]
at net.glowstone.bukkit2sponge.Bukkit2Sponge.load(Bukkit2Sponge.java:102) ~[?:?]
at net.glowstone.bukkit2sponge.Bukkit2Sponge.onEnable(Bukkit2Sponge.java:46) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:271) ~[Bukkit.jar:?]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [Bukkit.jar:?]

Running Minecraft 1.12.
Running latest jar downloaded from the link in README.md:
https://bamboo.gserv.me/browse/GSPP-B2S/latestSuccessful/artifact/shared/Plugin-JAR/bukkit2sponge-0.1.0-SNAPSHOT.jar

---
Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/46267010-java-util-nosuchelementexception-no-value-present?utm_campaign=plugin&utm_content=tracker%2F15396672&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F15396672&utm_medium=issues&utm_source=github).