Vue Error: TypeError: Cannot read properties of undefined (reading 'code')

Hi I got the error while using the package of jsonforms with vue2 seed. Also I've used vue2 with laravel 5.8.

Encountering a **TypeError: Cannot read properties of undefined (reading 'code')** error in Vue 2 application using JSONForms when processing dynamic form data.

Below are my package.json file:
`{
"private": true,
"scripts": {
"dev": "npm run development",
"development": "cross-env NODE_ENV=development NODE_OPTIONS='--openssl-legacy-provider' node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch": "npm run development -- --watch",
"watch-poll": "npm run watch -- --watch-poll",
"hot": "cross-env NODE_ENV=development NODE_OPTIONS='--openssl-legacy-provider' node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
"prod": "npm run production",
"production": "cross-env NODE_ENV=production NODE_OPTIONS='--openssl-legacy-provider' node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"storybook": "start-storybook -p 9000"
},
"devDependencies": {
"axios": "^0.19",
"bootstrap": "^4.1.0",
"cross-env": "^5.1",
"jquery": "^3.2",
"laravel-mix": "^4.0.7",
"lodash": "^4.17.13",
"popper.js": "^1.12",
"resolve-url-loader": "^2.3.1",
"sass": "^1.15.2",
"sass-loader": "^7.1.0",
"vue": "^2.6.14",
"vue-template-compiler": "^2.6.14"
},
"dependencies": {
"@jsonforms/core": "^2.4.0",
"@jsonforms/vue2": "^2.4.0",
"@jsonforms/vue2-vanilla": "^2.4.0",
"@vue/composition-api": "^1.7.2",
"ajv": "^6.12.6",
"ajv-formats": "^1.5.1",
"core-js": "^3.6.5",
"regenerator-runtime": "^0.14.1",
"tslib": "^2.8.1",
"uuid": "^9.0.0"
}
}
`
Below my component code:
`

import { generateDefaultUISchema } from '@jsonforms/core';
import { JsonForms } from '@jsonforms/vue2';
import { cloneDeep } from "lodash";
import { vanillaRenderers } from '@jsonforms/vue2-vanilla';
import Ajv from 'ajv';
import addFormats from "ajv-formats";
import { entry as arrayListEntry } from './Custom/ArrayList.vue';

export default {
name: 'JsonFormsComponent',
components: {
JsonForms,
},
data() {
return {
data: {},
ID_SUFFIX: "/Augmented",
schemaValidator: null,
renderers: [],
uiSchema: null,
requiredUiSchema: null,
activeTab: 'all',
tabs: [
{ id: 'all', label: 'All Fields' },
{ id: 'required', label: 'Required Fields' }
],
loadedSchema: null
};
},

methods: {
cleanUpSchemaForPresentation(schema) {
if (!schema || typeof schema !== 'object') {
return schema;
}
// For simplified schemas, we don't need aggressive cleaning
// Just ensure we have a valid schema structure
const clonedSchema = cloneDeep(schema);

// Only clean problematic properties if they exist
if (clonedSchema.allOf) {
delete clonedSchema.allOf;
}
if (clonedSchema.anyOf) {
delete clonedSchema.anyOf;
}
if (clonedSchema.oneOf) {
delete clonedSchema.oneOf;
}

// Ensure we have a valid ID
if (!clonedSchema.$id) {
clonedSchema.$id = this.generateUuid();
}

return clonedSchema;
},

generateUISchema(schema) {
return generateDefaultUISchema(this.cleanUpSchemaForPresentation(schema));
},

generateUuid() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
const r = Math.random() * 16 | 0;
const v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
},

generateRequiredUISchema(schema) {
try {
const clonedSchema = cloneDeep(schema);
const requiredSchema = this.filterRequiredFields(clonedSchema);
const uiSchema = generateDefaultUISchema(requiredSchema);
return uiSchema;
} catch (error) {
console.error('Error generating required UI schema:', error);
// Fallback to main UI schema if there's an error
return this.uiSchema;
}
},

filterRequiredFields(schema) {
if (!schema || typeof schema !== 'object') {
return schema;
}

const filteredSchema = { ...schema };

if (schema.properties) {
const requiredProps = schema.required || [];
const filteredProperties = {};

Object.keys(schema.properties).forEach(propName => {
const prop = schema.properties[propName];
if (requiredProps.includes(propName) || this.hasRequiredFields(prop)) {
filteredProperties[propName] = this.filterRequiredFields(prop);
}
});

filteredSchema.properties = filteredProperties;
filteredSchema.required = requiredProps.filter(propName =>
filteredProperties.hasOwnProperty(propName)
);
}

return filteredSchema;
},

hasRequiredFields(schema) {
if (!schema || typeof schema !== 'object') {
return false;
}

if (schema.required && schema.required.length > 0) {
return true;
}

if (schema.properties) {
return Object.values(schema.properties).some(prop => this.hasRequiredFields(prop));
}

return false;
},

switchTab(tabId) {
this.activeTab = tabId;
},

initializeSchemaValidator() {
this.schemaValidator = new Ajv({
allErrors: true,
verbose: true,
strict: false,
validateSchema: false,
});
addFormats(this.schemaValidator);
},

initializeRenderers() {
// Try putting custom renderer at the end for higher priority
this.renderers = [...vanillaRenderers, arrayListEntry];
this.renderers = Object.freeze(this.renderers);
},

onChange(e) {
try {
// Ensure the event object is valid before accessing properties
if (e && typeof e === 'object' && e.data !== undefined) {
this.data = e.data;
} else {
console.warn('Invalid change event received:', e);
this.data = {};
}
} catch (error) {
console.error('Error in onChange handler:', error);
this.data = {};
}
},

loadHerbSchema() {
try {
// Try to load from the correct path first
let response = fetch('/storage/herb.json');
if (!response.ok) {
// Fallback to test schema if herb.json fails
throw new Error('HTTP error! status: '+response.status);
}
const schema = response.json();
return schema;
} catch (error) {
console.error('Error loading schema:', error);
}
},
getValidationErrors() {
if (!this.schemaValidator || !this.loadedSchema || !this.data) {
return [];
}

try {
this.schemaValidator.validate(this.loadedSchema, this.data);
return this.schemaValidator.errors || [];
} catch (error) {
console.error('Error getting validation errors:', error);
return [];
}
},

getRequiredFieldErrors() {
const errors = this.getValidationErrors();
return errors.filter(error => {
// Filter for errors that indicate missing required fields
return error.keyword === 'required' ||
(error.keyword === 'minLength' && error.params && error.params.limit === 0) ||
(error.keyword === 'minItems' && error.params && error.params.limit > 0);
});
}

},
mounted() {
this.initializeSchemaValidator();
this.initializeRenderers();

// Load schema from herb.json
this.loadedSchema = this.loadHerbSchema();

if (this.loadedSchema) {
try {
// Clean and prepare the schema
const cleanedSchema = this.cleanUpSchemaForPresentation(this.loadedSchema);

// Ensure the schema has properties
if (!cleanedSchema.properties || Object.keys(cleanedSchema.properties).length === 0) {
cleanedSchema.properties = {
fallback_message: {
type: 'string',
title: 'Schema Information',
description: 'The schema was loaded but contains no displayable properties',
readOnly: true
}
};
cleanedSchema.required = [];
}

// Generate UI schema
try {
this.uiSchema = this.generateUISchema(cleanedSchema);
} catch (error) {
console.error('Error generating UI schema:', error);
// Create a simple fallback UI schema
this.uiSchema = {
type: 'VerticalLayout',
elements: Object.keys(cleanedSchema.properties || {}).map(propName => ({
type: 'Control',
scope: `#/properties/${propName}`
}))
};
}

// Generate required UI schema
try {
this.requiredUiSchema = this.generateRequiredUISchema(cleanedSchema);
} catch (error) {
console.error('Error generating required UI schema:', error);
// Use main UI schema as fallback for required fields
this.requiredUiSchema = this.uiSchema;
}
} catch (error) {
console.error('Error generating schemas in mounted:', error);
}
} else {
console.error('Failed to load schema');
}
},
computed: {
effectiveSchema() {
// Use loaded schema from herb.json
const schema = this.loadedSchema;
return schema;
},

isSchemaReady() {
return this.loadedSchema
&& Object.keys(this.loadedSchema

).length > 0 && this.uiSchema;
},
requiredFieldsCount() {
const schema = this.loadedSchema;
if (!schema || !schema.properties) {
return 0;
}

let count = 0;
const errors = this.getValidationErrors();
count = errors.length;
return count;
}
},
};
`

**Requirements**
- I don't want to upgrade the packages version of vue, vue-template-compiler & laravel-mix.

**Please help me figure out this error.**