Fix #42

modules/pegasus-actor.js

@@ -2044,7 +2044,7 @@ export class PegasusActor extends Actor {
     }
     // Check size
     if (item.type == "vehiclemodule" || item.type == "vehicleweaponmodule") {
-      item.system.space = item.system.space || 0
+      item.system.space = item.system?.space || 0
       if (this.system.modules.usedvms + Number(item.system.space) > this.system.modules.totalvms) {
         ChatMessage.create({ content: `No more room available to host module ${item.name}. Module is not added to the vehicle.` })
         return false