Unable to update posts or pages

Hi all

A site owned by one of my clients has recently run into problems with the Sucuri plugin. With the plugin active, it’s not possible to update any of the posts or pages on the site – it simply hits a white screen and hangs, with no errors displayed or logged. This only happens when changes are actually made in the post, not just hitting update on an un-changed post.

It seems like the wp-admin/post.php file is being blocked – I can’t see any options in the plugin that will let me whitelist it, as there only seem to be options to whitelist files under wp-content or wp-includes.

I’ve had to disable the plugin on the website for now, but I’d like to be able to re-activate it if I can get around this issue – thanks.