Undefined variable: lazy_sources in Image.php on line 273

Hi rocket support!

I have found this error:

PHP Notice: Undefined variable: lazy_sources in /wp-content/plugins/rocket-lazy-load/src/Dependencies/RocketLazyload/Image.php on line 273

In the file Image.php, the variable $lazy_sources is defined only if the above preg_match return TRUE.
By the way, $lazy_sources is undefined if the preg_match return false…

I suggest to move the define variable above the preg_match to fix it!