Stacktrace
```
[15:32:37 WARN]: [Plan] Encountered IllegalArgumentException with Buycraft Extension (failed safely) when updating value for 'server', the method was disabled temporarily (won't be called until next Plan reload), stack trace to follow (please report this):
[15:32:37 WARN]: [Plan] Error was caught by com.djrapitops.plan.extension.ExtensionSvc
java.lang.IllegalArgumentException: class com.djrapitops.extension.BuycraftExtension method purchaseTable could not be called: null
at com.djrapitops.plan.extension.implementation.providers.MethodWrapper.callMethod(MethodWrapper.java:51) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.implementation.providers.gathering.TableProviderValueGatherer.lambda$null$3(TableProviderValueGatherer.java:82) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.implementation.providers.gathering.TableProviderValueGatherer.getMethodResult(TableProviderValueGatherer.java:119) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.implementation.providers.gathering.TableProviderValueGatherer.gatherTableDataOfProvider(TableProviderValueGatherer.java:103) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.implementation.providers.gathering.TableProviderValueGatherer.gatherTableDataOfServer(TableProviderValueGatherer.java:86) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.implementation.providers.gathering.ProviderValueGatherer.updateValues(ProviderValueGatherer.java:162) ~[Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.ExtensionSvc.updateServerValues(ExtensionSvc.java:200) [Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.ExtensionSvc.updateServerValues(ExtensionSvc.java:187) [Plan-5.1-build-505.jar:?]
at com.djrapitops.plan.extension.ExtensionServerMethodCallerTask.run(ExtensionServerMethodCallerTask.java:41) [Plan-5.1-build-505.jar:?]
at com.djrapitops.plugin.task.bukkit.BukkitRunnableFactory$1.run(BukkitRunnableFactory.java:55) [Plan-5.1-build-505.jar:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:76) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_252]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_252]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_252]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_252]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_252]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_252]
at com.djrapitops.plan.extension.implementation.providers.Parameters$ServerParameters.usingOn(Parameters.java:63) ~[?:?]
at com.djrapitops.plan.extension.implementation.providers.MethodWrapper.callMethod(MethodWrapper.java:46) ~[?:?]
... 14 more
Caused by: java.lang.IllegalStateException: IOException occurred
at com.djrapitops.extension.ListPaymentRequest.makeRequest(ListPaymentRequest.java:82) ~[?:?]
at com.djrapitops.extension.BuycraftExtension.purchaseTable(BuycraftExtension.java:72) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_252]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_252]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_252]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_252]
at com.djrapitops.plan.extension.implementation.providers.Parameters$ServerParameters.usingOn(Parameters.java:63) ~[?:?]
at com.djrapitops.plan.extension.implementation.providers.MethodWrapper.callMethod(MethodWrapper.java:46) ~[?:?]
... 14 more
Caused by: java.io.IOException: Server returned HTTP response code: 504 for URL: https://plugin.tebex.io/payments
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900) ~[?:1.8.0_252]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498) ~[?:1.8.0_252]
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268) ~[?:1.8.0_252]
at com.djrapitops.extension.ListPaymentRequest.makeRequest(ListPaymentRequest.java:64) ~[?:?]
at com.djrapitops.extension.BuycraftExtension.purchaseTable(BuycraftExtension.java:72) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_252]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_252]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_252]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_252]
at com.djrapitops.plan.extension.implementation.providers.Parameters$ServerParameters.usingOn(Parameters.java:63) ~[?:?]
at com.djrapitops.plan.extension.implementation.providers.MethodWrapper.callMethod(MethodWrapper.java:46) ~[?:?]
... 14 more
```
Describe the issue
After a server reboot it just happened and had to reboot for it to be fixed and as to why it happened I have no idea
Server information
Spigot 1.12.2 Plan v5.1 build 505
Exceptions & Other Logs
https://hastebin.com/najibapica.log
Additional information