Index: binaries/data/mods/public/gui/common/tooltips.js
===================================================================
--- binaries/data/mods/public/gui/common/tooltips.js
+++ binaries/data/mods/public/gui/common/tooltips.js
@@ -536,6 +536,8 @@
  */
 function getEntityCostComponentsTooltipString(template, entity, buildingsCountToTrainFullBatch = 1, fullBatchSize = 1, remainderBatch = 0)
 {
+	if (!template.cost)
+		return [];
 	let totalCosts = multiplyEntityCosts(template, buildingsCountToTrainFullBatch * fullBatchSize + remainderBatch);
 	if (template.cost.time)
 		totalCosts.time = Math.ceil(template.cost.time * (entity ? Engine.GuiInterfaceCall("GetBatchTime", {
Index: binaries/data/mods/public/simulation/components/ProductionQueue.js
===================================================================
--- binaries/data/mods/public/simulation/components/ProductionQueue.js
+++ binaries/data/mods/public/simulation/components/ProductionQueue.js
@@ -369,8 +369,9 @@
 			let techCostMultiplier = this.GetTechCostMultiplier();
 
 			let cost = {};
-			for (let res in template.cost)
-				cost[res] = Math.floor((techCostMultiplier[res] || 1) * template.cost[res]);
+			if (template.cost)
+				for (let res in template.cost)
+					cost[res] = Math.floor((techCostMultiplier[res] || 1) * template.cost[res]);
 
 			// TrySubtractResources should report error to player (they ran out of resources).
 			if (!cmpPlayer.TrySubtractResources(cost))
@@ -386,7 +387,7 @@
 				this.SetAnimation("researching");
 			}
 
-			let time = techCostMultiplier.time * template.researchTime * 1000;
+			let time = techCostMultiplier.time * (template.researchTime || 0) * 1000;
 			this.queue.push({
 			    "id": this.nextID++,
 			    "player": cmpPlayer.GetPlayerID(),