Notifications not related to a document are making the notification templates fail

java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:571)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:554)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:221)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:368)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:492)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:171)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
	at org.apache.velocity.runtime.directive.Block.render(Block.java:94)
	at org.apache.velocity.runtime.directive.Block$Reference.render(Block.java:181)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:539)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:218)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:331)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:261)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:304)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:218)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:331)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:261)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:304)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
	at org.apache.velocity.Template.merge(Template.java:358)
	at org.apache.velocity.Template.merge(Template.java:262)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:280)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:321)
	at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:222)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:177)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:138)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:54)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:284)
	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:284)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:267)
	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.execute(DefaultBlockAsyncRendererExecutor.java:125)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.execute(InternalTemplateManager.java:928)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.execute(InternalTemplateManager.java:909)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.execute(DefaultTemplateManager.java:211)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.execute(DefaultTemplateManager.java:205)
	at org.xwiki.notifications.notifiers.internal.DefaultNotificationDisplayer.renderNotification(DefaultNotificationDisplayer.java:66)
	at org.xwiki.notifications.notifiers.internal.DefaultNotificationRenderer.renderCompositeEvent(DefaultNotificationRenderer.java:76)
	at org.xwiki.notifications.notifiers.internal.DefaultNotificationRenderer.render(DefaultNotificationRenderer.java:67)
	at org.xwiki.notifications.notifiers.internal.InternalHtmlNotificationRenderer.renderCompositeEvent(InternalHtmlNotificationRenderer.java:111)
	at org.xwiki.notifications.notifiers.internal.InternalHtmlNotificationRenderer.render(InternalHtmlNotificationRenderer.java:104)
	at org.xwiki.notifications.notifiers.internal.InternalHtmlNotificationRenderer.render(InternalHtmlNotificationRenderer.java:174)
	at org.xwiki.notifications.notifiers.internal.DefaultAsyncNotificationRenderer.render(DefaultAsyncNotificationRenderer.java:152)
	at org.xwiki.rendering.async.internal.AsyncRendererJob.runInternal(AsyncRendererJob.java:101)
	at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:246)
	at org.xwiki.job.AbstractJob.run(AbstractJob.java:223)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NullPointerException: Null keys are not supported!
	at java.base/java.util.Objects.requireNonNull(Objects.java:246)
	at org.infinispan.cache.impl.CacheImpl.assertKeyNotNull(CacheImpl.java:202)
	at org.infinispan.cache.impl.CacheImpl.get(CacheImpl.java:541)
	at org.infinispan.cache.impl.CacheImpl.get(CacheImpl.java:537)
	at org.infinispan.cache.impl.EncoderCache.get(EncoderCache.java:762)
	at org.xwiki.cache.infinispan.internal.InfinispanCache.get(InfinispanCache.java:103)
	at org.xwiki.wiki.internal.manager.WikiDescriptorCache.getFromId(WikiDescriptorCache.java:143)
	at org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getById(DefaultWikiDescriptorManager.java:166)
	at org.xwiki.wiki.script.WikiManagerScriptService.getById(WikiManagerScriptService.java:301)
	... 57 more