I tried to run BIMserver within the WildFly 9.0. The .war file is deployed without errors, but with some (I think non-critical) warnings. The server launches with the set-up page. When I enter my new user details and confirm I got the "WebSocket error".
Screenshot is here: Dropbox - Screenshot 2015-07-24 11.32.31.png

WildFly log is here:

Herango:bin andrejt$ /bin/bash standalone.sh

JBoss Bootstrap Environment

JBOSS_HOME: /Users/andrejt/Projects/Programiranje/wildfly-9.0.0.Final

JAVA: java

JAVA_OPTS: -server -XX:+UseCompressedOops -server -XX:+UseCompressedOops -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
11:26:10,441 INFO  org.jboss.modules JBoss Modules version 1.4.3.Final
11:26:12,529 INFO  org.jboss.msc JBoss MSC version 1.2.6.Final
11:26:12,580 INFO  org.jboss.as WFLYSRV0049: WildFly Full 9.0.0.Final (WildFly Core 1.0.0.Final) starting
11:26:13,334 INFO  org.jboss.as.controller.management-deprecated WFLYCTL0028: Attribute 'job-repository-type' in the resource at address '/subsystem=batch' is deprecated, and may be removed in future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
11:26:13,343 INFO  org.jboss.as.controller.management-deprecated WFLYCTL0028: Attribute 'enabled' in the resource at address '/subsystem=datasources/data-source=ExampleDS' is deprecated, and may be removed in future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
11:26:14,038 INFO  org.jboss.as.server WFLYSRV0039: Creating http management service using socket-binding (management-http)
11:26:14,053 INFO  org.xnio XNIO version 3.3.1.Final
11:26:14,061 INFO  org.xnio.nio XNIO NIO Implementation Version 3.3.1.Final
11:26:14,082 INFO  org.jboss.as.security WFLYSEC0002: Activating Security Subsystem
11:26:14,082 WARN  org.jboss.as.txn WFLYTX0013: Node identifier property is set to the default value. Please make sure it is unique.
11:26:14,087 INFO  org.wildfly.extension.io WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors
11:26:14,090 INFO  org.jboss.as.security WFLYSEC0001: Current PicketBox version=4.9.2.Final
11:26:14,101 INFO  org.jboss.as.jsf WFLYJSF0007: Activated the following JSF Implementations: [main]
11:26:14,101 INFO  org.jboss.as.clustering.infinispan WFLYCLINF0001: Activating Infinispan subsystem.
11:26:14,135 INFO  org.jboss.as.naming WFLYNAM0001: Activating Naming Subsystem
11:26:14,144 INFO  org.jboss.as.webservices WFLYWS0002: Activating WebServices Extension
11:26:14,146 INFO  org.wildfly.extension.undertow WFLYUT0003: Undertow 1.2.8.Final starting
11:26:14,146 INFO  org.wildfly.extension.undertow WFLYUT0003: Undertow 1.2.8.Final starting
11:26:14,160 INFO  org.jboss.as.connector WFLYJCA0009: Starting JCA Subsystem (IronJacamar 1.2.4.Final)
11:26:14,165 INFO  org.jboss.as.connector.subsystems.datasources WFLYJCA0004: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)
11:26:14,180 INFO  org.jboss.as.connector.deployers.jdbc WFLYJCA0018: Started Driver service with driver-name = h2
11:26:14,265 INFO  org.jboss.as.naming WFLYNAM0003: Starting Naming Service
11:26:14,265 INFO  org.jboss.as.mail.extension WFLYMAIL0001: Bound mail session [java:jboss/mail/Default]
11:26:14,266 INFO  org.jboss.remoting JBoss Remoting version 4.0.9.Final
11:26:14,357 INFO  org.wildfly.extension.undertow WFLYUT0014: Creating file handler for path /Users/andrejt/Projects/Programiranje/wildfly-9.0.0.Final/welcome-content
11:26:14,382 INFO  org.wildfly.extension.undertow WFLYUT0012: Started server default-server.
11:26:14,394 INFO  org.wildfly.extension.undertow WFLYUT0018: Host default-host starting
11:26:14,469 INFO  org.wildfly.extension.undertow WFLYUT0006: Undertow HTTP listener default listening on /127.0.0.1:8080
11:26:14,581 INFO  org.jboss.as.connector.subsystems.datasources WFLYJCA0001: Bound data source [java:jboss/datasources/ExampleDS]
11:26:14,682 INFO  org.jboss.as.server.deployment.scanner WFLYDS0013: Started FileSystemDeploymentService for directory /Users/andrejt/Projects/Programiranje/wildfly-9.0.0.Final/standalone/deployments
11:26:14,685 INFO  org.jboss.as.server.deployment WFLYSRV0027: Starting deployment of "bimserver-1.4.0-2015-07-20.war" (runtime-name: "bimserver-1.4.0-2015-07-20.war")
11:26:14,772 INFO  org.jboss.ws.common.management JBWS022052: Starting JBoss Web Services - Stack CXF Server 5.0.0.Final
11:26:17,995 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jsr-275-1.0-beta-2.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/geoapi-2.3-M1.jar does not point to a valid jar for a Class-Path reference.
11:26:17,997 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jsr-275-1.0-beta-2.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/geoapi-pending-2.3-M1.jar does not point to a valid jar for a Class-Path reference.
11:26:18,005 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jaxb-api-2.2.12-b140109.1041.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-core-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,006 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry istack-commons-runtime-2.19.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-core-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,006 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry txw2-2.2.10-b140310.1920.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-core-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,006 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jaxb-core.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-impl-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,007 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jaxb-core.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-xjc-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,007 WARN  org.jboss.as.server.deployment WFLYSRV0059: Class Path entry jaxb-impl.jar in /content/bimserver-1.4.0-2015-07-20.war/WEB-INF/lib/jaxb-xjc-2.2.10-b140310.1920.jar does not point to a valid jar for a Class-Path reference.
11:26:18,552 WARN  org.jboss.as.dependency.private WFLYSRV0018: Deployment "deployment.bimserver-1.4.0-2015-07-20.war" is using a private module ("org.apache.cxf.impl:main") which may be changed or removed in future versions without notice.
11:26:18,552 WARN  org.jboss.as.dependency.private WFLYSRV0018: Deployment "deployment.bimserver-1.4.0-2015-07-20.war" is using a private module ("org.apache.cxf.impl:main") which may be changed or removed in future versions without notice.
11:26:18,739 WARN  org.jboss.as.ee WFLYEE0007: Not installing optional component org.springframework.web.context.request.async.StandardServletAsyncWebRequest due to an exception (enable DEBUG log level to see the cause)
11:26:33,973 INFO  javax.enterprise.resource.webcontainer.jsf.config Initializing Mojarra 2.2.11-jbossorg-1 20150505-1501 for context '/bimserver-1.4.0-2015-07-20'
11:26:40,235 INFO  org.wildfly.extension.undertow WFLYUT0021: Registered web context: /bimserver-1.4.0-2015-07-20
11:26:40,262 INFO  org.jboss.as.server WFLYSRV0010: Deployed "bimserver-1.4.0-2015-07-20.war" (runtime-name : "bimserver-1.4.0-2015-07-20.war")
11:26:40,340 INFO  org.jboss.as WFLYSRV0060: Http management interface listening on http://127.0.0.1:9990/management
11:26:40,341 INFO  org.jboss.as WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
11:26:40,341 INFO  org.jboss.as WFLYSRV0025: WildFly Full 9.0.0.Final (WildFly Core 1.0.0.Final) started in 30128ms - Started 284 of 465 services (221 services are lazy, passive or on-demand)

Can you advice me how to solve the problem?

Best regards,
Andrej