PHP Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated

[EHCanadian]

PHP Deprecated: strtolower(): Passing null to parameter #1 ($string) of type string is deprecated in \public_html\vendor\afterlogic\mailso\lib\MailSo\Base\Utils.php on line 174

Edit to resolve

 if(is_null($sEncoding)){$sEncoding = \mb_get_info('internal_encoding');};

 $sEncoding = \strtolower($sEncoding);

Webmail version: 9.7.7.build12-build-o3
PHP version: 8.3.2 x64

[AfterLogic Support]

I have informed the developers on this. Thank you.