diff --git a/Models/ThemeConfig/Conversion/Conversion.ts b/Models/ThemeConfig/Conversion/Conversion.ts
index d2a8184e6..66a4135b4 100644
--- a/Models/ThemeConfig/Conversion/Conversion.ts
+++ b/Models/ThemeConfig/Conversion/Conversion.ts
@@ -297,6 +297,9 @@ export class Fuse<T> extends DesugaringStep<T> {
             const step = this.steps[i]
             try {
                 let r = step.convert(json, "While running step " + step.name + ": " + context)
+                if(r.result["tagRenderings"]?.some(tr => tr === undefined)){
+                    throw step.name+" introduced an undefined tagRendering"
+                }
                 errors.push(...(r.errors ?? []))
                 warnings.push(...(r.warnings ?? []))
                 information.push(...(r.information ?? []))
diff --git a/Models/ThemeConfig/Conversion/PrepareLayer.ts b/Models/ThemeConfig/Conversion/PrepareLayer.ts
index 0d3aaca2c..4e358cf74 100644
--- a/Models/ThemeConfig/Conversion/PrepareLayer.ts
+++ b/Models/ThemeConfig/Conversion/PrepareLayer.ts
@@ -593,6 +593,7 @@ export class AddEditingElements extends DesugaringStep<LayerConfigJson> {
 
         if (
             json.tagRenderings &&
+            this._desugaring.tagRenderings.has("just_created") &&
             !json.tagRenderings.some((tr) => tr === "just_created" || tr["id"] === "just_created")
         ) {
             json.tagRenderings.unshift(this._desugaring.tagRenderings.get("just_created"))
@@ -623,6 +624,7 @@ export class AddEditingElements extends DesugaringStep<LayerConfigJson> {
             json.source !== "special" &&
             json.source !== "special:library" &&
             json.tagRenderings &&
+            this._desugaring.tagRenderings.has("last_edit") &&
             !json.tagRenderings.some((tr) => tr["id"] === "last_edit")
         ) {
             json.tagRenderings.push(this._desugaring.tagRenderings.get("last_edit"))
@@ -1161,7 +1163,14 @@ export class AddMiniMap extends DesugaringStep<LayerConfigJson> {
         if (!hasMinimap) {
             layerConfig = { ...layerConfig }
             layerConfig.tagRenderings = [...layerConfig.tagRenderings]
-            layerConfig.tagRenderings.push(state.tagRenderings.get("minimap"))
+            const minimap = state.tagRenderings.get("minimap")
+            if(minimap === undefined){
+                if(state.tagRenderings.size > 0){
+                    throw "The 'minimap'-builtin tagrendering is not defined. As such, it cannot be added automatically"
+                }
+            }else{
+                layerConfig.tagRenderings.push()
+            }
         }
 
         return {
diff --git a/Models/ThemeConfig/Conversion/ValidationUtils.ts b/Models/ThemeConfig/Conversion/ValidationUtils.ts
index 43cd75c82..248a3a577 100644
--- a/Models/ThemeConfig/Conversion/ValidationUtils.ts
+++ b/Models/ThemeConfig/Conversion/ValidationUtils.ts
@@ -1,8 +1,8 @@
-import { TagRenderingConfigJson } from "../Json/TagRenderingConfigJson"
-import { Utils } from "../../../Utils"
+import {TagRenderingConfigJson} from "../Json/TagRenderingConfigJson"
+import {Utils} from "../../../Utils"
 import SpecialVisualizations from "../../../UI/SpecialVisualizations"
-import { RenderingSpecification, SpecialVisualization } from "../../../UI/SpecialVisualization"
-import { LayerConfigJson } from "../Json/LayerConfigJson"
+import {RenderingSpecification, SpecialVisualization} from "../../../UI/SpecialVisualization"
+import {LayerConfigJson} from "../Json/LayerConfigJson"
 
 export default class ValidationUtils {
     public static hasSpecialVisualisation(
@@ -10,10 +10,14 @@ export default class ValidationUtils {
         specialVisualisation: string
     ): boolean {
         return (
-            layer.tagRenderings?.some((tagRendering) =>
-                ValidationUtils.getSpecialVisualisations(<TagRenderingConfigJson>tagRendering).some(
-                    (vis) => vis.funcName === specialVisualisation
-                )
+            layer.tagRenderings?.some((tagRendering) => {
+                    if(tagRendering === undefined){
+                        return false
+                    }
+
+                    const spec = ValidationUtils.getSpecialVisualisations(<TagRenderingConfigJson>tagRendering)
+                    return spec.some((vis) => vis.funcName === specialVisualisation);
+                }
             ) ?? false
         )
     }
@@ -40,7 +44,7 @@ export default class ValidationUtils {
         const all: RenderingSpecification[] = []
         for (let translation of translations) {
             if (typeof translation == "string") {
-                translation = { "*": translation }
+                translation = {"*": translation}
             }
 
             for (const key in translation) {