Caused by: javax.xml.stream.XMLStreamException: WFLYCTL0083: Failed to load module org.jboss.as.ejb3

Issue

Our JBoss will not start with this error:

2023-06-28 09:34:06,679 ERROR [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0055: Caught exception during boot: org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0085: Failed to parse configuration
    at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:143)
    at org.jboss.as.server.ServerService.boot(ServerService.java:408)
    at org.jboss.as.controller.AbstractControllerService$1.run(AbstractControllerService.java:447)
    at java.lang.Thread.run(Thread.java:750)
Caused by: javax.xml.stream.XMLStreamException: WFLYCTL0083: Failed to load module org.jboss.as.ejb3
    at org.jboss.as.controller.parsing.DeferredExtensionContext.load(DeferredExtensionContext.java:100)
    at org.jboss.as.server.parsing.StandaloneXml_16.readServerElement(StandaloneXml_16.java:240)
    at org.jboss.as.server.parsing.StandaloneXml_16.readElement(StandaloneXml_16.java:140)
    at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:144)
    at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:52)
    at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:122)
    at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:76)
    at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:126)
    ... 3 more
Caused by: java.util.concurrent.ExecutionException: javax.xml.stream.XMLStreamException: WFLYCTL0083: Failed to load module
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:192)
    at org.jboss.as.controller.parsing.DeferredExtensionContext.load(DeferredExtensionContext.java:92)
    ... 10 more
Caused by: javax.xml.stream.XMLStreamException: WFLYCTL0083: Failed to load module
    at org.jboss.as.controller.parsing.DeferredExtensionContext.loadModule(DeferredExtensionContext.java:129)
    at org.jboss.as.controller.parsing.DeferredExtensionContext.access$000(DeferredExtensionContext.java:44)
    at org.jboss.as.controller.parsing.DeferredExtensionContext$1.call(DeferredExtensionContext.java:74)
    at org.jboss.as.controller.parsing.DeferredExtensionContext$1.call(DeferredExtensionContext.java:71)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1348)
    at java.lang.Thread.run(Thread.java:750)
    at org.jboss.threads.JBossThread.run(JBossThread.java:513)
Caused by: org.jboss.modules.ModuleLoadException: No module.xml file found at /opt/jboss-eap-7.4/modules/custom_module/conf/main/module.xml
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:251)
    at org.jboss.modules.LocalModuleFinder.parseModuleXmlFile(LocalModuleFinder.java:250)
    at org.jboss.modules.LocalModuleFinder.lambda$findModule$1(LocalModuleFinder.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.jboss.modules.LocalModuleFinder.findModule(LocalModuleFinder.java:195)
    at org.jboss.modules.ModuleLoader.findModule0(ModuleLoader.java:700)
    at org.jboss.modules.ModuleLoader.findModule(ModuleLoader.java:693)
    at org.jboss.modules.ModuleLoader.loadModuleLocal(ModuleLoader.java:503)
    at org.jboss.modules.DelegatingModuleLoader.preloadModule(DelegatingModuleLoader.java:57)
    at org.jboss.modules.Module.addExportedPaths(Module.java:1425)
    at org.jboss.modules.Module.addPaths(Module.java:1317)
    at org.jboss.modules.Module.link(Module.java:1644)
    at org.jboss.modules.Module.relinkIfNecessary(Module.java:1672)
    at org.jboss.modules.ModuleLoader.loadModule(ModuleLoader.java:303)
    at org.jboss.modules.ModuleLoader.loadModule(ModuleLoader.java:287)
    at org.jboss.as.controller.parsing.DeferredExtensionContext.loadModule(DeferredExtensionContext.java:111)
    ... 10 more