FP Match getCarrierFeature() Crash

ERROR GAME DETAILS:

uid=4624728

gameID=1633750

ERROR DETAIL PICTURE:

ERROR BOX TITLE:

An error occured

army.getCarrierFeature(...) is null

ERROR BOX BODY:

----

army.getCarrierFeature(...) is null

ultshared.warfare.UltArmy.prototype.addArmy@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:33819:45

hup.ArmySelectionModel.prototype.setSelected@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:55946:15

hup.ArmySelectionModel.prototype.updateArmies@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:56044:5

hup.ui.CanvasMapRenderer.prototype.onStateChange@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:59563:5

hup.ui.TileMapRenderer.prototype.onStateChange@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:70345:5

notify@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:271:7

publish@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:345:11

ultshared.UltArmyState.prototype.publishUpdate@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:35104:5

hup.GameStateHandler.prototype.sendUpdateNotification@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:47900:9

hup.GameStateHandler.prototype.onMessage@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:47758:21

notify@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:271:7

publish@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:345:11

lzr.Server.prototype.onMessage@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:3240:5

lzr.AjaxServer.prototype.onMessage@http://www.callofwar.com/ww2-dev/js/main-built-min.js?bust=1476774813:3352:5

r.Callbacks/i@http://www.callofwar.com/ww2-dev/js/external/jquery/jquery-3.1.0.min.js?bust=1476774812:2:27598

r.Callbacks/j.fireWith@http://www.callofwar.com/ww2-dev/js/external/jquery/jquery-3.1.0.min.js?bust=1476774812:2:28369

A@http://www.callofwar.com/ww2-dev/js/external/jquery/jquery-3.1.0.min.js?bust=1476774812:4:13856

.send/c/<@http://www.callofwar.com/ww2-dev/js/external/jquery/jquery-3.1.0.min.js?bust=1476774812:4:16146

Details:

TypeError: army.getCarrierFeature(...) is null

WHEN THIS ERROR OCCURRED:

I had selected an enemy naval unit. Then I + on another enemy unit to group select all units of that type into my total group selection. That unit was a stack with at least a battleship and a carrier.

SPECIAL NOTE:

Before this happened, I've been noticing that clicking on a unit would not always update the unit box, and sometimes the unit box would not even open. This occurred excessively-so just before the error occurred.