Fix: Deprecated: explode(): Passing null to parameter #2 ($string)

[lewislarsen]

Pull Request

Description

There was a bug that showed itself when the .ENV didn't have any admin email addresses set.

Per PHP 8.4 Passing null to parameter #2 ($string) of type string is deprecated which this PR aims to address.

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• [ ]

How Has This Been Tested?

• Automated testing (Feature tests, Unit tests)
• Manual testing

Checklist:

• I have performed a self-review of my own code
• My changes do not introduce any new warnings or errors
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes
• I have used translation helpers and provided translations (where appropriate)

Screenshots (if applicable):

Additional context

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