java.util.NoSuchElementException: No value present

I can't quite tell when this happens but it happens every once in a while.

Versions:

SeriousVote: 4.5
Minecraft: 1.12.2
SpongeAPI: 7.1.0-SNAPSHOT-6aa4e43
SpongeForge: 1.12.2-2611-7.1.0-BETA-2931
Minecraft Forge: 14.23.2.2611

Log:

 [00:43:24] [Server thread/ERROR] [Sponge]: The Scheduler tried to run the task SeriousVote-CommandRewardExecutor owned by Plugin{id=seriousvote, name=SeriousVote, version=4.5, description=This plugin enables server admins to give players rewards for voting for their server., source=/home/container/./mods/plugins/seriousvote-4.5.jar}, but an error occured.
java.util.NoSuchElementException: No value present
at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_161]
at net.adamsanchez.seriousvote.SeriousVote.processVotes(SeriousVote.java:566) ~[SeriousVote.class:?]
at net.adamsanchez.seriousvote.SeriousVote.lambda$onPostInit$0(SeriousVote.java:227) ~[SeriousVote.class:?]
at org.spongepowered.api.scheduler.Task$Builder.lambda$execute$0(Task.java:139) ~[Task$Builder.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:186) ~[SchedulerBase.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SyncScheduler.executeTaskRunnable(SyncScheduler.java:70) ~[SyncScheduler.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SchedulerBase.startTask(SchedulerBase.java:179) ~[SchedulerBase.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SchedulerBase.processTask(SchedulerBase.java:165) ~[SchedulerBase.class:1.12.2-2611-7.1.0-BETA-2931]
at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707) [?:1.8.0_161]
at org.spongepowered.common.scheduler.SchedulerBase.runTick(SchedulerBase.java:108) [SchedulerBase.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SyncScheduler.tick(SyncScheduler.java:44) [SyncScheduler.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.common.scheduler.SpongeScheduler.tickSyncScheduler(SpongeScheduler.java:185) [SpongeScheduler.class:1.12.2-2611-7.1.0-BETA-2931]
at org.spongepowered.mod.SpongeMod.onTick(SpongeMod.java:278) [SpongeMod.class:1.12.2-2611-7.1.0-BETA-2931]
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_14_SpongeMod_onTick_ServerTickEvent.invoke(.dynamic) [?:?]
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) [ASMEventHandler.class:?]
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:651) [EventBus.class:?]
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:589) [EventBus.class:?]
at net.minecraftforge.fml.common.FMLCommonHandler.onPreServerTick(FMLCommonHandler.java:278) [FMLCommonHandler.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:655) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]

AgentSanchez / SeriousVote

java.util.NoSuchElementException: No value present #9