PHP Warning: Undefined array key "style"

[photoninger]

Prerequisites

• I have searched for duplicate or closed issues
• I can recreate the issue with all plugins disabled

Describe the issue

After upgrading to roundcube-1.6.8 I see in errors.log:
PHP Warning: Undefined array key "style" in /srv/www/roundcube/program/actions/mail/index.php on line 1192

Line 1192 is:

$attrs['style'] = ($attrs['style'] ? trim($attrs['style'], ';') . '; ' : '') . implode('; ', $style);

What browser(s) are you seeing the problem on?

No response

What version of PHP are you using?

8.2

What version of Roundcube are you using?

1.6.8

JavaScript errors

No response

PHP errors

PHP Warning: Undefined array key "style" in /srv/www/roundcube/program/actions/mail/index.php on line 1192

[alecpl]

Fixed.