Invalid CSRF token. Send the form again.

Me too.

Trying to run a standard SQL query

SELECT *
FROM wp_smooth_slider, wp_posts
WHERE wp_smooth_slider.post_id = wp_posts.post_id
LIMIT 50

Does this help?

https://stackoverflow.com/questions/23455780/the-csrf-token-is-invalid-please-try-to-resubmit-the-form

[edited post above]

Thanks for the hint. I will check this for the next release.