My WordPress Admin Styles Are Missing
The WordPress admin dashboard is part of the WordPress core. Site administrators and users should not modify the WordPress core due to the potential implications of making a mistake, which could cause elements of the site to break. A modified core could also cause problems when updating to a newer version of WordPress.
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The Problem
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If your WordPress admin style is missing or corrupt, the WordPress admin dashboard may not display properly. Columns, sections and buttons may be missing or misaligned. Additionally, some of the core features of the admin menu may be missing or non-functional. There are several issues that could cause the problem.
Plug-in Compatibility Problems
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WordPress plug-ins are developed by third-party, primarily individual developers. Some plug-ins are not properly coded and may have compatibility issues with WordPress. This is often caused by a particular plug-in being incompatible with a specific version of WordPress. To check if the problem is plug-in related, deactivate all of your site's plug-ins and then check to see if the admin menu is functioning correctly. If it is, reactivate the plug-ins one by one and check the menu again. When you re-activate the corrupt or incompatible plug-in, the admin style will again become corrupt. Once you determine the plug-in that's causing the problem, deactivate and delete it.
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Corrupted Theme or Style Sheet
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If you are using a WordPress theme that overrides part of the admin menu to produce a specific design and the theme or its style sheet is corrupt or incompatible, it could cause problems with your WordPress admin dashboard style. To check the theme, try switching to a new theme. If the problem goes away, the theme was corrupt or incompatible.
Corrupted Admin Files
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Admin files should not become corrupt on their own. If you've modified parts of the WordPress core, however, you may have made a mistake that causes the admin menu to not display correctly. To fix corrupt admin files, update WordPress to the latest version in the dashboard or download the latest version manually from WordPress.org. Open the contents of the installation folder and extract the "WP-Admin" folder. Access your Web host's file management system and replace your current "WP-Admin" folder with the admin folder you downloaded.
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