Fix #9749 - Fatal error with validateFields when using v4 Api

[ebogaard]

Description

Fixes fatal error with validateFields function when using v4 Api.

Motivation and Context

How To Test This

Try using the SuiteCRM Outlook plug-in and archiving an e-mail. The fatal error should not hapen anymore.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.

[SuiteBot]

All committers have signed the CLA.