fast velocity minify is not working correctly

It’s probably a problem with incompatible javascript or css code (common when you merge them together). You have to trace down witch file is causing the conflict and add it to the ignore list.

I usually go through the logs on the plugin page, add them all to the ignore list, clear the cache and try again.

If it works, then you remove one by one from the ignore list until you find the culprit.

You can also try first to disable htlm minification first, followed by javascript, and css… so you can find out if it is related to js or css.