Getting error: java.lang.NullPointerException

[naisanza]

The error message just reads: null

Not sure how it happened, but Gfm Preview still seems to work regardless

null
java.lang.NullPointerException
	at com.github.shyykoserhiy.gfm.markdown.offline.MarkdownJna$Buffer.toString(MarkdownJna.java:32)
	at com.github.shyykoserhiy.gfm.markdown.offline.JnaMarkdownParser$GfmWorker.run(JnaMarkdownParser.java:81)
	at com.github.shyykoserhiy.gfm.markdown.ThrottlePoolExecutor$DelayedCancalableTask.run(ThrottlePoolExecutor.java:42)
	at java.lang.Thread.run(Thread.java:745)