NullPointerException inside adminvote gui

[srhmike420]

Versions
7.1 paper 26.1.2

Describe the bug

17.06 01:02:22 [Server] WARN java.lang.NullPointerException
17.06 01:02:22 [Server] WARN at java.base/java.util.Objects.requireNonNull(Objects.java:220)
17.06 01:02:22 [Server] WARN at java.base/java.util.Optional.of(Optional.java:113)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.Codec.lambda$optionalFieldOf$12(Codec.java:306)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.MapEncoder$1.encode(MapEncoder.java:26)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.MapCodec$2.encode(MapCodec.java:83)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$8.encode(RecordCodecBuilder.java:378)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.codecs.RecordCodecBuilder$2.encode(RecordCodecBuilder.java:112)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.MapCodec$MapCodecCodec.encode(MapCodec.java:164)
17.06 01:02:22 [Server] WARN at com.mojang.serialization.Encoder.encodeStart(Encoder.java:14)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.util.Conversions.convert(Conversions.java:51)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.dialog.PaperDialogs.constructDialog(PaperDialogs.java:54)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.dialog.PaperDialogRegistryEntry$PaperBuilder.build(PaperDialogRegistryEntry.java:71)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.dialog.PaperDialogRegistryEntry$PaperBuilder.build(PaperDialogRegistryEntry.java:46)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.util.Conversions.createApiInstanceFromBuilder(Conversions.java:100)
17.06 01:02:22 [Server] WARN at io.papermc.paper.registry.data.InlinedRegistryBuilderProviderImpl.createDialog(InlinedRegistryBuilderProviderImpl.java:20)
17.06 01:02:22 [Server] WARN at io.papermc.paper.dialog.Dialog.create(Dialog.java:32)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//io.github.projectunified.unidialog.paper.dialog.PaperDialog.getDialog(PaperDialog.java:144)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//io.github.projectunified.unidialog.paper.dialog.PaperDialog.opener(PaperDialog.java:215)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.dialog.PaperUniDialogPlatform.showMultiAction(PaperUniDialogPlatform.java:152)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.dialog.UniDialogService.showMultiAction(UniDialogService.java:108)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.dialog.MultiActionDialogBuilder.open(MultiActionDialogBuilder.java:99)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.valuerequest.ValueRequest.requestString(ValueRequest.java:204)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.advancedcore.command.gui.UserGUI.openUsersGUI(UserGUI.java:172)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.advancedcore.command.gui.AdminGUI$2.onClick(AdminGUI.java:98)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.advancedcore.api.inventory.BInventoryButton.onClick(BInventoryButton.java:280)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.advancedcore.api.inventory.BInventory.onClick(BInventory.java:678)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.advancedcore.api.inventory.BInventoryListener$2.run(BInventoryListener.java:109)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.scheduler.BukkitScheduler.lambda$runTaskAsynchronously$6(BukkitScheduler.java:68)
17.06 01:02:22 [Server] WARN at VotingPlugin-7.1.jar//com.bencodez.votingplugin.simpleapi.folialib.impl.SpigotImplementation.lambda$runAsync$1(SpigotImplementation.java:54)
17.06 01:02:22 [Server] WARN at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:80)
17.06 01:02:22 [Server] WARN at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:57)
17.06 01:02:22 [Server] WARN at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22)
17.06 01:02:22 [Server] WARN at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
17.06 01:02:22 [Server] WARN at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
17.06 01:02:22 [Server] WARN at java.base/java.lang.Thread.run(Thread.java:1474)

To Reproduce
Steps to reproduce the behavior:

1. command /adminvote gui
2. Click on Users
   Does nothing after that, throws the error

Expected behavior
To see the users?

[BenCodez]

https://bencodez.com/job/VotingPlugin/

this better?