error on boot without internet

[20:20:00 WARN]: java.net.UnknownHostException: oss.sonatype.org
[20:20:00 WARN]:        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:221)
[20:20:00 WARN]:        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:402)
[20:20:00 WARN]:        at java.base/java.net.Socket.connect(Socket.java:591)
[20:20:00 WARN]:        at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:657)
[20:20:00 WARN]:        at java.base/sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:174)
[20:20:00 WARN]:        at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
[20:20:00 WARN]:        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
[20:20:00 WARN]:        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:265)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:372)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1181)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1075)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1581)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1509)
[20:20:00 WARN]:        at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:245)
[20:20:00 WARN]:        at java.base/java.net.URL.openStream(URL.java:1117)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.download(StorageConnector.java:64)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.downloadRequiredFiles(StorageConnector.java:75)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.download(StorageConnector.java:88)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.setupAndConnect(StorageConnector.java:102)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.read(StorageConnector.java:117)
[20:20:00 WARN]:        at xyz.upperlevel.uppercore.storage.StorageConnector.read(StorageConnector.java:127)
[20:20:00 WARN]:        at xyz.upperlevel.uppercoretest.UppercoreTest.onEnable(UppercoreTest.java:52)
[20:20:00 WARN]:        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264)
[20:20:00 WARN]:        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337)
[20:20:00 WARN]:        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403)
[20:20:00 WARN]:        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381)
[20:20:00 WARN]:        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330)
[20:20:00 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:422)
[20:20:00 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:383)
[20:20:00 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:338)
[20:20:00 WARN]:        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272)
[20:20:00 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545)
[20:20:00 WARN]:        at java.base/java.lang.Thread.run(Thread.java:844)
[20:20:00 ERROR]: Error occurred while enabling UppercoreTest vfinal (Is it up to date?)
java.lang.IllegalStateException: Storage 'nitritedb' not supported
        at xyz.upperlevel.uppercore.storage.StorageConnector.setupAndConnect(StorageConnector.java:103) ~[?:?]
        at xyz.upperlevel.uppercore.storage.StorageConnector.read(StorageConnector.java:117) ~[?:?]
        at xyz.upperlevel.uppercore.storage.StorageConnector.read(StorageConnector.java:127) ~[?:?]
        at xyz.upperlevel.uppercoretest.UppercoreTest.onEnable(UppercoreTest.java:52) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:422) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:383) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:338) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at java.lang.Thread.run(Thread.java:844) [?:?]