nyxmidnight

Resetting the plugin folder allowed it to work! The problem was coming from either NextGEN Gallery or Secure WordPress, both of whom require a version of PHP that is higher than the one my server has. Without these two installed, Insert into Post works smoothly as intended.

Thanks!

Forgot to mention it doesn’t work in Safari for Mac either.

Thank you SO MUCH!!! Method #2 worked and it didn’t turn the blog into a white page.