404 error on saving or editing posts

[awaymiss]

I do not know what is causing this, but every time I save my post, I get an error message saying it is not found. It will redirect to: http://lizzysgrandadventure.x10.mx/wp-admin/post.php rather than showing the post. I tried using a default theme (Twenty Fifteen), deactivating all plugins, both locally and through the network (multisite setup), and I tried shortening the post. If I do a post with no images on the default theme, it shows up...I also tried it on my current theme...Posts with no images and only a few words showed up, but posts that were longer than a 500 words won't show up. I get the 404 error message. I'm also able to post flickr albums and the like using the flicker plugin on the shorter posts. So, the question is: Is there a word count limit for posts and how do I find out what mine is set at? I looked through the files but I'm rusty on php so I'm not sure.

Blog: http://lizzysgrandadventure.x10.mx/
Test Posts (I'll remove these after this is resolved):
1. http://lizzysgrandadventure.x10.mx/test-post-2/
2. http://lizzysgrandadventure.x10.mx/test-post-3/
3. http://lizzysgrandadventure.x10.mx/test-post-4/

I can do a debug thing but someone will have to walk me through it since I've not done that in Wordpress before. Any help would be appreciated! I've been trying to post my newest entry for hours. Thank you in advance.

 

[awaymiss]

I figured out what the problem was. It was a slideshow plugin for showing Flickr galleries. Even though I had disabled the plugin, the folder had files that was interfering with posting. I renamed that folder and then everything started working again. Thanks.