每次重新启动后，过一段时间，就会报错出现500。docker里面报错日志如下：
`2023-02-28T09:34:16.843+08:00 ERROR 6 --- [ndedElastic-770] o.s.w.s.adapter.HttpWebHandlerAdapter : [abd4c492-934] 500 Server Error for HTTP GET "/"
org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "currentUser.avatar ?: #theme.assets('/images/default-avatar.svg')" (template: "modules/header" - line 100, col 17)
at org.thymeleaf.spring6.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:292) ~[thymeleaf-spring6-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at run.halo.app.theme.ReactiveSpelVariableExpressionEvaluator.evaluate(ReactiveSpelVariableExpressionEvaluator.java:29) ~[classes/:2.2.0]
at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:166) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.standard.processor.AbstractStandardExpressionAttributeTagProcessor.doProcess(AbstractStandardExpressionAttributeTagProcessor.java:144) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement(ProcessorTemplateHandler.java:918) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.StandaloneElementTag.beHandled(StandaloneElementTag.java:228) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.Model.process(Model.java:282) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement(ProcessorTemplateHandler.java:1204) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.StandaloneElementTag.beHandled(StandaloneElementTag.java:228) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.Model.process(Model.java:282) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleOpenElement(ProcessorTemplateHandler.java:1587) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.OpenElementTag.beHandled(OpenElementTag.java:205) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.TemplateModel.process(TemplateModel.java:136) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:592) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1103) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1077) ~[thymeleaf-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.thymeleaf.spring6.SpringWebFluxTemplateEngine.lambda$createFullStream$0(SpringWebFluxTemplateEngine.java:198) ~[thymeleaf-spring6-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:58) ~[reactor-core-3.5.2.jar:3.5.2]
at reactor.core.publisher.Mono.subscribe(Mono.java:4444) ~[reactor-core-3.5.2.jar:3.5.2]
at reactor.core.publisher.MonoSubscribeOn$SubscribeOnSubscriber.run(MonoSubscribeOn.java:126) ~[reactor-core-3.5.2.jar:3.5.2]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) ~[reactor-core-3.5.2.jar:3.5.2]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) ~[reactor-core-3.5.2.jar:3.5.2]
at java.base/java.util.concurrent.FutureTask.run(Unknown Source) ~[na:na]
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[na:na]
at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1021E: A problem occurred whilst attempting to access the property 'avatar': 'Can't happen. Check SUPPORTED_CLASSES'
at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:209) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:104) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:405) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:92) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.ast.Elvis.getValueInternal(Elvis.java:54) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:112) ~[spring-expression-6.0.4.jar:6.0.4]
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:338) ~[spring-expression-6.0.4.jar:6.0.4]
at org.thymeleaf.spring6.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:265) ~[thymeleaf-spring6-3.1.1.RELEASE.jar:3.1.1.RELEASE]
... 32 common frames omitted
Caused by: java.lang.IllegalStateException: Can't happen. Check SUPPORTED_CLASSES
at org.springframework.integration.json.JsonPropertyAccessor.asJson(JsonPropertyAccessor.java:104) ~[spring-integration-core-6.0.2.jar:6.0.2]
at org.springframework.integration.json.JsonPropertyAccessor.canRead(JsonPropertyAccessor.java:75) ~[spring-integration-core-6.0.2.jar:6.0.2]
at run.halo.app.theme.ReactivePropertyAccessor.canRead(ReactivePropertyAccessor.java:39) ~[classes/:2.2.0]
at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:198) ~[spring-expression-6.0.4.jar:6.0.4`
