Hello All,

I have a new LabKey installation with server 19.1. The installation went smoothly and the admin user has been created. When I add the first user I get the following error:

500: Unexpected server error
javax/activation/DataHandler

Home Back
java.lang.NoClassDefFoundError: javax/activation/DataHandler
at org.labkey.api.util.MailHelper.createMultipartMessage(MailHelper.java:130)
at org.labkey.api.security.SecurityMessage.createMailMessage(SecurityMessage.java:53)
at org.labkey.api.security.SecurityManager.createMessage(SecurityManager.java:1049)
at org.labkey.api.security.SecurityManager.sendEmail(SecurityManager.java:1026)
at org.labkey.api.security.SecurityManager.sendRegistrationEmail(SecurityManager.java:2816)
at org.labkey.api.security.SecurityManager.addUser(SecurityManager.java:2743)
at org.labkey.core.security.SecurityController$AddUsersAction.handlePost(SecurityController.java:1342)
at org.labkey.core.security.SecurityController$AddUsersAction.handlePost(SecurityController.java:1277)
at org.labkey.api.action.FormViewAction.handleRequest(FormViewAction.java:91)
at org.labkey.api.action.FormViewAction.handleRequest(FormViewAction.java:70)
at org.labkey.api.action.BaseViewAction.handleRequest(BaseViewAction.java:176)
at org.labkey.api.action.SpringActionController.handleRequest(SpringActionController.java:487)
at org.labkey.api.module.DefaultModule.dispatch(DefaultModule.java:1265)
at org.labkey.api.view.ViewServlet._service(ViewServlet.java:204)
at org.labkey.api.view.ViewServlet.service(ViewServlet.java:131)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.labkey.api.data.TransactionFilter.doFilter(TransactionFilter.java:38)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.labkey.api.module.ModuleLoader.doFilter(ModuleLoader.java:1220)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.labkey.api.security.AuthFilter.doFilter(AuthFilter.java:215)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.labkey.core.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: java.lang.ClassNotFoundException: javax.activation.DataHandler
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:436)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 50 more
request attributes
LABKEY.OriginalURL = http://localhost:8080/labkey/security-addUsers.view?
LABKEY.StartTime = 1553535942494
LABKEY.action = addUsers
org.springframework.web.servlet.DispatcherServlet.CONTEXT = Root WebApplicationContext: startup date [Mon Mar 25 17:40:53 UTC 2019]; parent: Root WebApplicationContext
LABKEY.controller = security
LABKEY.Counter = 0
org.labkey.api.util.ExceptionUtil$exception = java.lang.NoClassDefFoundError: javax/activation/DataHandler
X-LABKEY-CSRF = 69c367027f31cfb429044ddf64416823
LABKEY.container =
LABKEY.RequestURL = /labkey/security-addUsers.view?
LABKEY.OriginalURLHelper = /labkey/security-addUsers.view?

core schema database configuration
Server URL jdbc:postgresql://localhost:5432/labkey
Product Name PostgreSQL
Product Version 9.5.2
Driver Name PostgreSQL JDBC Driver
Driver Version 42.2.5

Any help is greatly appreciated.

Thanks,
Stefan