CJT tool box on my site has been disappeared, and just a blank page there, and right before that I had upgraded WP version to 3.9.1. I have no idea if that was the cause for the current blank issue. But anyway, I just downgraded to 3.9, but still the same. Please help me, for I really need CJT plugin for building my website.
Thanks for your message.
No it should work fine with WordPress 3.9.1 as I have tested it with this version of WordPress. This is a strange issue, that seems like it could be a PHP memory error (without outputting the error).