After updating WordPress, Visual Edit box does not work

Hi,
I recently updated WordPress to 4.0 and updated “Inpost Gallery” to the latest version. After that, when I edit a post, Visual edit box does not work and it does not respond to any input, and I have to deactivate Inpost Gallery, publish the post, then I can re-activate the Inpost gallery; and it works fine for the older posts I used it.
Am I missing something, or there is aconflict between these two updates?
With thanks in advance.

https://ww.wp.xz.cn/plugins/inpost-gallery/