I’m having issues with the Revolution Slider as well. I created a custom template, tested to see if I could upload Google Analytic PDFs and once it saved I received the ‘Ajax error’. That’s not the biggest problem though. Now I cannot even access anything in my WordPress dashboard this includes creating pages, posts or making any changes to files. The page just goes blank. My site is still up and running on the server but I cannot change anything with the website. I even tried logging in using the wp-admin but no avail. I’m REALLY in trouble here guys, please help me out!