ProtocolLib + Vault Hook Error w/ JSONAPI

[TheB741]

Hey so Im getting this error in my terminal with JSONAPI and I think it is occurring with the link to ProtocolLib. The plugin (JSONAPI) still works and I can connect to my server through Adminium, though the constant errors in my console is annoying. Below is my terminal log and I tried a rewritten version of some kind from other forum but no avail. (From another issue topic: https://github.com/d03n3rfr1tz3/Bukkit.JSONAPI/releases)

My terminal log from a fresh startup:

Loading libraries, please wait...
[23:19:03 INFO]: Starting minecraft server version 1.8.3
[23:19:03 INFO]: Loading properties
[23:19:03 INFO]: Default game type: SURVIVAL
[23:19:03 INFO]: This server is running CraftBukkit version git-Spigot-4c7d0c0-7d020a7 (MC: 1.8.3) (Implementing API version 1.8.3-R0.1-SNAPSHOT)
[23:19:03 INFO]: Debug logging is disabled
[23:19:03 INFO]: Server Ping Player Sample Count: 12
[23:19:03 INFO]: Using 4 threads for Netty based IO
[23:19:03 INFO]: Generating keypair
[23:19:04 INFO]: Starting Minecraft server on :25565
[23:19:04 INFO]: Using default channel type
[23:19:04 INFO]: Set PluginClassLoader as parallel capable
[23:19:04 INFO]: [Vault] Loading Vault v1.5.6-b49
[23:19:04 INFO]: [ProtocolLib] Loading ProtocolLib v3.6.4
[23:19:04 WARN]: [ProtocolLib] [ProtocolLibrary] Unable to retrieve current Minecraft version. Assuming (MC: 1.8.7)
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
at com.comphenix.protocol.ProtocolConfig.getIgnoreVersionCheck(ProtocolConfig.java:167) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.ProtocolLibrary.verifyMinecraftVersion(ProtocolLibrary.java:461) [ProtocolLib.jar:?]
at com.comphenix.protocol.ProtocolLibrary.onLoad(ProtocolLibrary.java:206) [ProtocolLib.jar:?]
at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugins(CraftServer.java:296) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
at net.minecraft.server.v1_8_R2.DedicatedServer.init(DedicatedServer.java:199) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:522) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
[23:19:04 INFO]: [JSONAPI] Loading JSONAPI v5.6.0
[23:19:04 INFO]: [Essentials] Loading Essentials vTeamCity
[23:19:04 INFO]: [EssentialsChat] Loading EssentialsChat vTeamCity
[23:19:04 INFO]: [EssentialsSpawn] Loading EssentialsSpawn vTeamCity
[23:19:04 INFO]: [Vault] Enabling Vault v1.5.6-b49
[23:19:04 INFO]: [Vault] [Economy] Essentials Economy found: Waiting
[23:19:04 INFO]: [Vault] [Permission] SuperPermissions loaded as backup permission system.
[23:19:04 INFO]: [Vault] Enabled Version 1.5.6-b49
[23:19:04 INFO]: [ProtocolLib] Enabling ProtocolLib v3.6.4
[23:19:04 INFO]: [ProtocolLib] Structure compiler thread has been disabled.
[23:19:04 INFO]: *** Beginning UUID conversion, this may take A LONG time ****
[23:19:04 INFO]: Preparing level "world"
[23:19:04 INFO]: -------- World Settings For [world] --------
[23:19:04 INFO]: Zombie Aggressive Towards Villager: true
[23:19:04 INFO]: Chunks to Grow per Tick: 650
[23:19:04 INFO]: Clear tick list: false
[23:19:04 INFO]: Experience Merge Radius: 3.0
[23:19:04 INFO]: Allow Zombie Pigmen to spawn from portal blocks: true
[23:19:04 INFO]: Item Despawn Rate: 6000
[23:19:04 INFO]: Item Merge Radius: 2.5
[23:19:04 INFO]: Arrow Despawn Rate: 1200
[23:19:04 INFO]: View Distance: 10
[23:19:04 INFO]: Mob Spawn Range: 4
[23:19:04 INFO]: Anti X-Ray: true
[23:19:04 INFO]: Engine Mode: 1
[23:19:04 INFO]: Hidden Blocks: [14, 15, 16, 21, 48, 49, 54, 56, 73, 74, 82, 129, 130]
[23:19:04 INFO]: Replace Blocks: [1, 5]
[23:19:04 INFO]: Nerfing mobs spawned from spawners: false
[23:19:04 INFO]: Cactus Growth Modifier: 100%
[23:19:04 INFO]: Cane Growth Modifier: 100%
[23:19:04 INFO]: Melon Growth Modifier: 100%
[23:19:04 INFO]: Mushroom Growth Modifier: 100%
[23:19:04 INFO]: Pumpkin Growth Modifier: 100%
[23:19:04 INFO]: Sapling Growth Modifier: 100%
[23:19:04 INFO]: Wheat Growth Modifier: 100%
[23:19:04 INFO]: Entity Activation Range: An 32 / Mo 32 / Mi 16
[23:19:04 INFO]: Entity Tracking Range: Pl 48 / An 48 / Mo 48 / Mi 32 / Other 64
[23:19:04 INFO]: Hopper Transfer: 8 Hopper Check: 8 Hopper Amount: 1
[23:19:04 INFO]: Random Lighting Updates: false
[23:19:04 INFO]: Structure Info Saving: true
[23:19:04 INFO]: Sending up to 5 chunks per packet
[23:19:04 INFO]: Max Entity Collisions: 8
[23:19:04 INFO]: Custom Map Seeds: Village: 10387312 Feature: 14357617
[23:19:04 INFO]: Max TNT Explosions: 100
[23:19:04 INFO]: Tile Max Tick Time: 50ms Entity max Tick Time: 50ms
[23:19:05 INFO]: -------- World Settings For [world_the_end] --------
[23:19:05 INFO]: Zombie Aggressive Towards Villager: true
[23:19:05 INFO]: Chunks to Grow per Tick: 650
[23:19:05 INFO]: Clear tick list: false
[23:19:05 INFO]: Experience Merge Radius: 3.0
[23:19:05 INFO]: Allow Zombie Pigmen to spawn from portal blocks: true
[23:19:05 INFO]: Item Despawn Rate: 6000
[23:19:05 INFO]: Item Merge Radius: 2.5
[23:19:05 INFO]: Arrow Despawn Rate: 1200
[23:19:05 INFO]: View Distance: 10
[23:19:05 INFO]: Mob Spawn Range: 4
[23:19:05 INFO]: Anti X-Ray: true
[23:19:05 INFO]: Engine Mode: 1
[23:19:05 INFO]: Hidden Blocks: [14, 15, 16, 21, 48, 49, 54, 56, 73, 74, 82, 129, 130]
[23:19:05 INFO]: Replace Blocks: [1, 5]
[23:19:05 INFO]: Nerfing mobs spawned from spawners: false
[23:19:05 INFO]: Cactus Growth Modifier: 100%
[23:19:05 INFO]: Cane Growth Modifier: 100%
[23:19:05 INFO]: Melon Growth Modifier: 100%
[23:19:05 INFO]: Mushroom Growth Modifier: 100%
[23:19:05 INFO]: Pumpkin Growth Modifier: 100%
[23:19:05 INFO]: Sapling Growth Modifier: 100%
[23:19:05 INFO]: Wheat Growth Modifier: 100%
[23:19:05 INFO]: Entity Activation Range: An 32 / Mo 32 / Mi 16
[23:19:05 INFO]: Entity Tracking Range: Pl 48 / An 48 / Mo 48 / Mi 32 / Other 64
[23:19:05 INFO]: Hopper Transfer: 8 Hopper Check: 8 Hopper Amount: 1
[23:19:05 INFO]: Random Lighting Updates: false
[23:19:05 INFO]: Structure Info Saving: true
[23:19:05 INFO]: Sending up to 5 chunks per packet
[23:19:05 INFO]: Max Entity Collisions: 8
[23:19:05 INFO]: Custom Map Seeds: Village: 10387312 Feature: 14357617
[23:19:05 INFO]: Max TNT Explosions: 100
[23:19:05 INFO]: Tile Max Tick Time: 50ms Entity max Tick Time: 50ms
[23:19:05 INFO]: Preparing start region for level 0 (Seed: 6464611952131771271)
[23:19:05 INFO]: Preparing start region for level 1 (Seed: 6464611952131771271)
23:19:06 INFO: [JSONAPI] Enabling JSONAPI v5.6.0
23:19:06 INFO: [JSONAPI] Logging to file: true
23:19:06 INFO: [JSONAPI] Logging to console: false
23:19:06 INFO: [JSONAPI] IP Whitelist = None, all requests are allowed.
23:19:06 INFO: [JSONAPI] Attempting to use port 20059
23:19:06 INFO: [Essentials] Enabling Essentials vTeamCity
23:19:06 INFO: Bukkit version format changed. Version not checked.

23:19:06 INFO: Using locale en_US
23:19:07 INFO: Using locale en_US
23:19:07 INFO: [Vault][Economy] Essentials Economy hooked.
23:19:07 INFO: Essentials: Using config file enhanced permissions.
23:19:07 INFO: Permissions listed in as player-commands will be given to all users.
23:19:07 INFO: [EssentialsChat] Enabling EssentialsChat vTeamCity
23:19:07 INFO: [EssentialsSpawn] Enabling EssentialsSpawn vTeamCity
23:19:07 INFO: Server permissions file permissions.yml is empty, ignoring it

23:19:07 INFO: [Vault] Checking for Updates ...
[23:19:08 INFO]: [Vault] No new version available
[23:19:09 WARN]: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[23:19:09 WARN]: at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
[23:19:09 WARN]: at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1884)
[23:19:09 WARN]: at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
[23:19:09 WARN]: at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
[23:19:09 WARN]: at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
[23:19:09 WARN]: at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
[23:19:09 WARN]: at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
[23:19:09 WARN]: at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
[23:19:09 WARN]: at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
[23:19:09 WARN]: at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
[23:19:09 WARN]: at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
[23:19:09 WARN]: at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)
[23:19:09 WARN]: at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)
[23:19:09 WARN]: at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
[23:19:09 WARN]: at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1300)
[23:19:09 WARN]: at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
[23:19:09 WARN]: at java.net.URL.openStream(URL.java:1037)
[23:19:09 WARN]: at com.alecgorge.minecraft.jsonapi.JSONServer.connectionInfo(JSONServer.java:130)
[23:19:09 WARN]: at com.alecgorge.minecraft.jsonapi.JSONServer$1.run(JSONServer.java:108)
[23:19:09 WARN]: at java.lang.Thread.run(Thread.java:744)
[23:19:09 WARN]: Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[23:19:09 WARN]: at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
[23:19:09 WARN]: at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
[23:19:09 WARN]: at sun.security.validator.Validator.validate(Validator.java:260)
[23:19:09 WARN]: at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
[23:19:09 WARN]: at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
[23:19:09 WARN]: at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
[23:19:09 WARN]: at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)
[23:19:09 WARN]: ... 15 more
[23:19:09 WARN]: Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[23:19:09 WARN]: at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
[23:19:09 WARN]: at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
[23:19:09 WARN]: at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
[23:19:09 WARN]: ... 21 more