IE8 showing error "Object doesn't support this property or method" for aui-form-validator.js file

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.10 EE GA1, 6.2.X EE
• Fix Version/s: 6.2.X EE, 7.0.0 DXP FP1, 7.0.2 CE GA3, 7.0.0 DXP SP1, 7.0.3 CE GA4, Master
• Component/s: Frontend Infrastructure
• Labels:
  • ee-ts
  • liferay-digital-enterprise-70-sp1
  • liferay-fixpack-de-1-7010
  • liferay-fixpack-portal-115-6210
• Branch Version/s:
  7.0.x, 6.2.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/13776

Reproduction steps:
1. Set a VM for IE 8
2. Setup a 6.2 bundle
3. Deploy the WAR file provided by the customer
4. Set the test portlet into a page and fill the blank fields

Actual result: No custom validation message shown
Expected result: Custom validation mesaage shown correctly

Reproduced on 6.2.x: commit f8661eb60f4da306bc3d72121d403a3ee5ea1746