I have installed for first time autoptimize plugin and after activate it, I enabled the 3 options one by one, to see if there were any troubleshooting with any of them:
-Option html- no problem. Everything looks ok.
-Option CSS- Very big problem because after anable this option my webside doesn't load. Just appear on the top of the screen this message:
Fatal error: Cannot redeclare class Minify_CSS_Compressor in /home4/ftworld/public_html/sala-fw/wp-content/themes/website/drone/ext/minify/css.php on line 21
So, I tried the option: "Look for scripts only in head?" but the same consecuences, white screen with same message.
-Option javascript: My website loads but some things doesn't load properly: the slideshows created with the plugin NextGen Gallery, the facebook box widget (included in my theme) don't load, the featured image in the posts in the homepage is empty, doesn't load, and some other images with link in homepage doesn't load. And the facebook, twitter and google+ like butons that are at the end of every post doesn't load neither.
I tried the option: "Look for scripts only in head?" but same consecuences.
So there are anything that could I do?
Now I only have enabled the html option