When i go to engine kits in catalog, this happens. I don't know what's the problem because i don't know which engine causes this.
!Script error
Thread: THRD-RUNVMI Dummy.handleEvent
Error: Thread::run: [illegal methodcall] null.currentPrice() type:L;
java.game.InventoryItem_Part:getPrice (line:92)
java.game.InventoryItem_Folder:getPrice (line:59)
java.game.CatalogInventory:update (line:1871)
java.game.Catalog:collectObjectsStep (line:346)
java.game.Catalog:collectObjectsEnd (line:251)
java.game.Catalog:osdCommand (line:1712)
java.render.osd.Gadget:sendMessage (line:211)
java.render.osd.Button:click (line:31)
java.render.Group:handleEvent (line:178)