QUICK TIP - Top Common Errors on WordPress make your headache!

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Solution: Enable Index.php

headache-migraine | A&H Business Technology
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If your blog is hosted on a Windows server, this could be an error with Directory Indexes.

  1. Login to the Control Panel.
  2. Click on Web Options.
  3. Go to Directory Indexes section.
  4. Add index.php to the Directory Indexes.

9.Fatal error undefined function is_network_admin()

The problem:

You receive “Fatal error undefined function is_network_admin()” when you login to WordPress admin after updating WordPress.

Solution: Manual Update

This error is caused by a fail WordPress version upgrade. Try a manual update.

  1. Download the latest WordPress zip file and unzip it.
  2. Back up your WordPress.
  3. Rename wp-includes and wp-admin directories to wp-includes.bak and wp-admin.bak.
  4. Upload the wp-includesand wp-admin directories from unzipped folder to your web host via FTP.
  5. Upload files from new wp-content to your existing wp-content folder. Replace and overwrite existing files.
  6. Upload the new version of the rest of files from the root directory to your existing WordPress root directory.
  7. Remove .maintenance at your WordPress directory via FTP.
  8. Login to WordPress admin and you will be given a link to URL like “http://domain.com/wordpress/wp-admin/upgrade.php”. Follow the link and instructions.
  9. Clear your cache to see the changes if you have caching enabled.

For more details about WordPress manual update, read http://codex.wordpress.org/Updating_WordPress#Manual_Update.

10. WordPress Admin Login 404 Issue

The problem:

You’re not able to login to WordPress admin. You receive a 404 error page instead.

Solution 1: Update the URL in database

If you’re able to access phpMyAdmin, try to update the URL in the database.

  1. Login cPanel, click on phpMyAdmin under Databases.
    WordPress Admin Login 404 Issue - 10 Most Common WordPress Errors (+Solutions)

  2. Select your WordPress database. For example: Username_wrdp1.
  3. Go to wp_options, click on Browse.
    WordPress Admin Login 404 Issue - 10 Most Common WordPress Errors (+Solutions)

  4. Search for siteurl under the field option_name.
  5. Click on Edit Field.
    WordPress Admin Login 404 Issue - 10 Most Common WordPress Errors (+Solutions)

  6. Change the URL in the input box of option_value.
    WordPress Admin Login 404 Issue - 10 Most Common WordPress Errors (+Solutions)

  7. At the bottom of page, click the Go button.

Solution 2: Update Folder Attributes

  1. Go to “/wp-admin” directory via FTP.
  2. Right click on wp-admin directory and click on File Attributes.
  3. Update the value to 755 and check Recurse into subdirectories if there’s an option.
    WordPress Admin Login 404 Issue - 10 Most Common WordPress Errors (+Solutions)

  4. Click OK.
  5. Repeat step 1 to step 4 for /wp-content and wp-includes.
  6. Open your web browser and try to login to WordPress admin. Press Ctrl + F5 to clear cache.

11. “Briefly unavailable for scheduled maintenance” message remainins after an automatic upgrade

The problem:

Your WordPress site is showing “Briefly unavailable for scheduled maintenance” after an automatic upgrade has completed.
Briefly unavailable for scheduled maintenance - 10 Most Common WordPress Errors (+Solutions)

Solution: Remove .maintenance file

A file named .maintenance is placed by WordPress during an automatic upgrade to notify visitors that the site in under a short maintenance. If an upgrade fails or is corrupted, the file will remain in the WordPress folder and won’t get deleted.

To remove .maintenance file,

  1. Access your blog root directory via FTP.
  2. Locate the file .maintenance.
    Briefly unavailable for scheduled maintenance - 10 Most Common WordPress Errors (+Solutions)

  3. Remove the .maintenance file from the blog root directory.

Once you solve this problem, you may want to run the WordPress automatic upgrade again.

12. Can’t delete a plugin

The problem:

You’re not able to delete a plugin in WordPress admin. It still appears even after you have deleted the directory via FTP.

Solution: Delete plugin via Secure Shell (SSH)

Your plugin might had uploaded some hidden/nested files inside the plugin directory which didn’t appear in FTP.

If you have SSH access to your blog,

  1. Login your site via SSH.
  2. Use SSH commands to nagivate “../wp-content/plugins/”.
  3. Use ls -al to see the full list of folders.
    Briefly unavailable for scheduled maintenance - 10 Most Common WordPress Errors (+Solutions)

  4. Delete the particular plugin folder with rm (Folder Name).

Have comments you want to share abou the errors and solutions above? Share them below.

Final words

During developing your website, you will face to many issues from easy to hard. Before going to one solution that you found or searched please carefully backup your step before going with it.
You can save more time and easy to fix the issues. In this troubleshooting tutorial, we just select the most common issues that we can face to and easily get lost. Finally, we hope the tutorial can help you to fix the issues.
If you need support  or ask for information you can add comments below. We will try to answer asap. Thanks for your reading time.

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