[Plugin: Awesome Flickr Gallery] Maximum execution time

I create the gallery, print shortcode in my template and it shows me an error: Maximum execution time of 30 seconds exceeded in …\wp-content\plugins\awesome-flickr-gallery-plugin\afgFlickr\afgFlickr.php on line 218

I have changed execution time to 100 seconds, but it still an error

https://www.ads-software.com/extend/plugins/awesome-flickr-gallery-plugin/