KosaKraft Updater config.zip Issue

[22:42:17] [main/INFO]: Loading tweak class name com.kosakorner.modpackupdater.Updater
[22:42:17] [main/INFO]: Using primary tweak class name com.kosakorner.modpackupdater.Updater
[22:42:17] [main/INFO]: Calling tweak class com.kosakorner.modpackupdater.Updater
Grabbing configs...
java.util.zip.ZipException: error in opening zip file
    at java.util.zip.ZipFile.open(Native Method)
    at java.util.zip.ZipFile.<init>(Unknown Source)
    at java.util.zip.ZipFile.<init>(Unknown Source)
    at java.util.zip.ZipFile.<init>(Unknown Source)
    at com.kosakorner.modpackupdater.util.FileUtils.unzipFile(FileUtils.java:67)
    at com.kosakorner.modpackupdater.updaters.ConfigUpdater.onSuccess(ConfigUpdater.java:34)
    at com.kosakorner.modpackupdater.net.Downloader.run(Downloader.java:85)
    at com.kosakorner.modpackupdater.updaters.ConfigUpdater.update(ConfigUpdater.java:30)
    at com.kosakorner.modpackupdater.Updater.acceptOptions(Updater.java:89)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)