[Bug] Unable to parse claim data

[Baktus79]

If a player tries to open the claim menu or tries to take out keys with /cr claim all, if the menu is empty of keys, then an error message will appear in the console.

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Error message

[14:19:23 WARN]: [CrateReloaded] Unable to parse claim data for a25335f3-f281-4324-9f3b-91788e0222b4: 
[14:19:23 WARN]: java.lang.NullPointerException: key is not found in config
[14:19:23 WARN]:        at CrateReloaded.jar//crate.U.b(YamlClaimLineParser.java:17)
[14:19:23 WARN]:        at CrateReloaded.jar//crate.R.a(V1YamlClaimLineParser.java:25)
[14:19:23 WARN]:        at CrateReloaded.jar//crate.R.apply(V1YamlClaimLineParser.java:21)
[14:19:23 WARN]:        at CrateReloaded.jar//crate.Q.a(V1ToV2.java:30)
[14:19:23 WARN]:        at CrateReloaded.jar//crate.V.a(YamlClaimStorage.java:93)
[14:19:23 WARN]:        at CrateReloaded.jar//crate.V.b(YamlClaimStorage.java:115)
[14:19:23 WARN]:        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
[14:19:23 WARN]:        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1760)
[14:19:23 WARN]:        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
[14:19:23 WARN]:        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
[14:19:23 WARN]:        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
[14:19:23 WARN]:        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
[14:19:23 WARN]:        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)

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Server version: Paper-461
Plugin version: 2.3.8