MC-5691: Implement better developer error reporting

- Allow errors within stage-builder to bubble up to main catch
- Add additional step to test to increase stability

Author: davemacaulay

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminPageBuilderReadNonMasterFormatTest.xml

@@ -121,6 +121,7 @@
         </actionGroup>
         <waitForElementVisible selector="{{CmsNewPagePageActionsSection.pageTitle}}" stepKey="waitForPageBuilderDisplay" />
         <waitForElementVisible time="1" selector="{{CmsNewPagePageActionsSection.showHideEditor}}" stepKey="waitForShowHideEditor" />
+        <waitForElementVisible selector="{{TinyMCESection.TinyMCE4}}" stepKey="waitForTinyMCE4" />
         <click selector="{{CmsNewPagePageActionsSection.showHideEditor}}" stepKey="clickShowHideEditor"/>
         <waitForElementVisible time="1" selector="{{CmsNewPagePageActionsSection.content}}" stepKey="waitForContentField" />
         <fillField selector="{{CmsNewPagePageActionsSection.content}}" userInput="{{cmsPageNonexistentDataRole.content}}" stepKey="enterContent"/>

app/code/Magento/PageBuilder/view/adminhtml/web/js/master-format/read/configurable.js

@@ -586,7 +586,7 @@ export default class Preview {
 
         return appearanceConfig(
             this.config.name,
-            appearance
+            appearance,
         ).preview_template;
     }
 

app/code/Magento/PageBuilder/view/adminhtml/web/js/stage-builder.js

@@ -6,6 +6,7 @@
 import $ from "jquery";
 import mageUtils from "mageUtils";
 import _ from "underscore";
+import Config from "../../config";
 import appearanceConfig from "../../content-type/appearance-config";
 import PropertyReaderPool from "../../converter/converter-pool";
 import ConverterPool from "../../converter/converter-pool";
@@ -14,7 +15,6 @@ import MassConverterPool from "../../mass-converter/converter-pool";
 import massConverterPoolFactory from "../../mass-converter/converter-pool-factory";
 import propertyReaderPoolFactory from "../../property/property-reader-pool-factory";
 import {ReadInterface} from "../read-interface";
-import Config from "../../config";
 
 /**
  * @api

app/code/Magento/PageBuilder/view/adminhtml/web/ts/js/content-type/preview.ts

@@ -60,13 +60,7 @@ function buildElementIntoStage(element: Element, parent: ContentTypeCollectionIn
             return Promise.all(childrenPromises.map((child, index) => {
                 parent.addChild(child);
                 return buildElementIntoStage(childElements[index], child, stage);
-            })).catch((error) => {
-                console.error(error);
-                return null;
-            });
-        }).catch((error) => {
-            console.error(error);
-            return null;
+            }));
         });
     }
 }
@@ -135,9 +129,6 @@ function getElementData(element: HTMLElement, config: ContentTypeConfigInterface
                 });
             });
         }
-    }).catch((error) => {
-        console.error(error);
-        return null;
     });
 }
 
@@ -223,7 +214,8 @@ export default function build(
     // Determine if we're building from existing page builder content
     if (validateFormat(content)) {
         currentBuild = buildFromContent(stage, content)
-            .catch(() => {
+            .catch((error: Error) => {
+                console.error(error);
                 stage.children([]);
                 currentBuild = buildEmpty(stage, content);
             });