Magento backend - CMS edit page broken

Question

This is what I see when I browse cms edit page in magento:

enter image description here

This bug is not visible in cms block edit page or category/product edit pages. Just the CMS> Page.

I tried updating to the latest version (1.9.3.8) and disabling all extensions. Non of these worked. Also, there's no javascript error on page. Any ideas how to fix this?

Answer 1

Make sure all CSS files have been updated to 1.9.3.8 in skin/adminhtml/default/default and try the site in incognito mode.

Make sure all layout and template files in app/code/design/adminhtml were replaced and cache flushed or var/cache directory deleted.

If you are using a custom adminhtml theme, disable it entirely.

• zekia: I'm not using a custom theme. I re-uploaded all admin design/skin files. Problem still not fixed. The issue was there before updating magento. I tried to update in order to solve it.

Answer 2

The bug was caused by en extension called Magento Twitter Cards (https://github.com/laurent35240/magento-twittercards). Disabling all extensions in local.xml file did not disable the adminhtml layout that caused this issue.

In order to solve this I commented Twitter Cards tab in file app/design/adminhtml/default/default/layout/twittercards.xml

• elfling: You'd mentioned "I tried updating to the latest version (1.9.3.8) and disabling all extensions." This isn't a default magento extension ;-)
• zekia: I tried to disable all extensions by changing local.xml file "disable_local_modules" to true. That didn't have any impact. Afterwards I tried to disable extensions one by one. That showed me the cause of the problem