Exception in thread "main" java.lang.NullPointerException
        at java.util.regex.Matcher.getTextLength(Matcher.java:1283)
        at java.util.regex.Matcher.reset(Matcher.java:309)
        at java.util.regex.Matcher.<init>(Matcher.java:229)
        at java.util.regex.Pattern.matcher(Pattern.java:1093)
        at org.spigotmc.builder.VersionInfo.hashFromUrl(VersionInfo.java:62)
        at org.spigotmc.builder.VersionInfo.getShaServerHash(VersionInfo.java:51)
        at org.spigotmc.builder.Builder.checkHash(Builder.java:731)
        at org.spigotmc.builder.Builder.main(Builder.java:400)
        at org.spigotmc.builder.Bootstrap.main(Bootstrap.java:27)