Getting exception after code change + page reload

[magro]

I'm playing again with this example and after any code change (e.g. changing the default pageSize in Computer.list) I'm getting a NoSuchElementException: None.get on the page reload:

--- (RELOAD) ---                                                                                                                                         

[info] play - database [default] connected at jdbc:h2:mem:play                                                                                           
[info] play - Application started (Dev)                                                                                                                  
[error] application -                                                                                                                                    

! Internal server error, for (GET) [/computers] ->

java.lang.ExceptionInInitializerError: null
        at controllers.Application$.<init>(Application.scala:29) ~[na:na]
        at controllers.Application$.<clinit>(Application.scala) ~[na:na]
        at Routes$$anonfun$routes$1$$anonfun$applyOrElse$2$$anonfun$apply$2.apply(routes_routing.scala:81) ~[na:na]
        at Routes$$anonfun$routes$1$$anonfun$applyOrElse$2$$anonfun$apply$2.apply(routes_routing.scala:81) ~[na:na]
        at play.core.Router$HandlerInvoker$$anon$6.call(Router.scala:170) ~[play_2.10.jar:2.2.0]
        at play.core.Router$Routes$class.invokeHandler(Router.scala:375) ~[play_2.10.jar:2.2.0]
Caused by: java.util.NoSuchElementException: None.get
        at scala.None$.get(Option.scala:313) ~[scala-library.jar:na]
        at scala.None$.get(Option.scala:311) ~[scala-library.jar:na]
        at net.fwbrasil.activate.entity.EntityHelper$.getEntityMetadata(EntityHelper.scala:55) ~[activate-core_2.10-1.4.jar:1.4]
        at net.fwbrasil.activate.migration.Migration.createTableForEntity(Migration.scala:240) ~[activate-core_2.10-1.4.jar:1.4]
        at net.fwbrasil.activate.migration.Migration$StorageVersionMigration$1.up(Migration.scala:33) ~[activate-core_2.10-1.4.jar:1.4]
        at net.fwbrasil.activate.migration.Migration.upActions(Migration.scala:198) ~[activate-core_2.10-1.4.jar:1.4]
[error] application - Error while rendering default error page

Should this work or is it a known limitation?

[magro]

Awesome, thanx for the fast fix!