I’ve got a weird issue. I was editing a page on my site and when I hit done/publish, it went to an 500 Internal Error. Just that page had the error - the rest of the site was fine.
I deactivated plugins and found that AntiSpam Bee was the culprit. I can see the content in the normal editor, but when I try to view the page with page builder on, the content area is blank and the toolbar at the top is missing.
I had been editing other pages before this one without issue.
How do I restore this?
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Hey Gretchen,
Can you disable all plugins and see if you can get the page back? It could have something to do with the caching plugin you’re using as well.
Ben
Hi Ben - I have deactivated everything and the page shows up, but when I activate just Page builder after that, I get a blank content area.
I have flushed the caching on siteground and page builder. The content is there when I switch to the visual page editor.
Hey Gretchen,
This is a really weird issue that you have. Do you remember the contents of the page? Does it have a script that might have caused this issue? Can you try, via the revisions, reverting the page back to an earlier time and see if that changes anything? Probably before you made some changes to it? Also, would it be fine if we can disable the plugins or change themes on the site to check further?
Ben
This just happened on another site… same server. Client edited her home page and when she saved it she got a 500 error.
I deactivated the Antispam Bee plugin and now the page is blank just like the first site. The content is there in the visual editor, but when we activate page builder mode, it goes to a white screen with no toolbar up top. All I see is the header.
Feel free to login to the first site I posted and troubleshoot. I have backups. 
Hey Gretchen,
Are you running this site on nginx as well as the other one you’re having problems with?
Ben
They are both on the same siteground server.
Hey Gretchen,
The site is indeed running on nginx. Bear with us since we’re not really nginx experts here. We did encounter a few issues with it which exhibits a similar symptom. Can you try the fix below and see if it works?
In the vHost config, you have to make a change from:try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /index.php;
TO –
try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /index.php?$query_string;
with the ( ?$query_string; ) at the end solved the issue :=)
You can contact your hosting provider for assistance if you’re not sure. 
Let us know how it goes!
Ben
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Hi Gretchen,
Are you still able to recreate the white screen? If so, using your favourite FTP client connect to your server and navigate to your root directory where WordPress is installed.
You should found a file called wp-config.php, open this up and locate a line of code called WP_DEBUG. By default, this is set to false, can you replace the word false with true, please?
Then save the changes and when the file, has finished uploading. Refresh the page with the white screen, this should now show an error (white screens usually indicate a PHP error has occurred).
If you see an error, please copy and paste it into your reply and we can take a closer look.
Thanks,
Danny
Well - I think I have the solution… one of the other sites with this issue started giving me 502 errors so I contacted siteground. They restarted nginx and as soon as they did, I was able to open the broken page in page builder and it restored itself so I just published it.
Weird, but that did resolve it on both sites.
Hi Gretchen,
Happy to hear the issue has been resolved. Thank you very much for informing us, we appreciate it.
Thanks,
Danny