Resolving the ‘blog/wp-json/wp/v2/posts/100 Not Found’ Issue in WordPress

The error message you’re encountering, “Updating failed. The route blog/wp-json/wp/v2/posts/100 could not be found,” suggests that your WordPress site is unable to find the specified post via the REST API. This can happen for a few reasons:

1. Incorrect Post ID: The post ID 100 might not exist. Double-check the ID to ensure it is correct.
2. Permalink Structure: Sometimes the permalink structure can cause issues with the REST API. Go to Settings > Permalinks and simply save the settings to refresh the permalinks.
3. Caching Issues: If you use a caching plugin, it might be causing the issue. Clear your site cache and try again.
4. Plugins Conflicts: A plugin might be interfering with the REST API. Deactivate all plugins and reactivate them one by one to identify the culprit.
5. Theme Issues: Your theme might be causing the problem. Switch to a default theme (like Twenty Twenty-One) and see if the issue persists.
6. REST API Disabled: Ensure that the REST API is not disabled on your site. Some security plugins might disable it.
7. Server Configuration: Your server might be blocking the REST API. Check with your hosting provider to ensure there are no restrictions.
8. Outdated WordPress: Ensure that your WordPress installation is up to date.

Steps to Troubleshoot:

1. Verify Post ID:

• Go to the WordPress dashboard.
• Navigate to Posts and find the post with ID 100 to ensure it exists.

2. Refresh Permalinks:

• Go to Settings > Permalinks.
• Click “Save Changes” without making any changes.

3. Clear Cache:

• Clear your site’s cache if you’re using a caching plugin.

4. Deactivate Plugins:

• Deactivate all plugins.
• Check if the issue is resolved.
• Reactivate each plugin one by one to find the problematic one.

5. Switch Theme:

• Go to Appearance > Themes.
• Activate a default theme like Twenty Twenty-One.
• Check if the issue persists.

6. Check REST API Status:

• Go to the Health Check & Troubleshooting plugin (if installed).
• Check for any issues with the REST API.

7. Contact Hosting Provider:

• Ask if there are any server settings blocking the REST API.

8. Update WordPress:

• Ensure you are running the latest version of WordPress.

By following these steps, you should be able to identify and resolve the issue causing the error with the REST API. If the problem persists, consider seeking help from WordPress support forums or your hosting provider’s support team.