Yes this is helpful plugin but required correct configuration.

Hi Nguyen Dat tai,

If you uninstall also the problem will not end.

I hope once installed this plugin your entered into the risk zone. We need to do proper configure the plugin otherwise the problem will run in the back end site will go down. Even If you uninstall also the problem will continued I have seen one of the article JS/CSS Compressor will compress the all JS& CSS code into single. If uninstall some code will come to normal some codes won’t come to normal we have to change manually.

For that only I have done extra payment for JS/CSS Compressor configuration. Even flynax team (Vladimir) done configuration but he not done properly because still I have lot of problem with this plugin. Again I have created the ticket but no response as of now.