[BUG] strlen(): Passing null to parameter #1 on newsletter template preview

[sreichel]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Deprecated functionality: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/app/code/core/Mage/Newsletter/Model/Template.php on line 164

Expected Behavior

No error.

Steps To Reproduce

Preview newsletter template.

Environment

- OpenMage: latest
- php: 8.1

Anything else?

No response