How to fix WordPress 5.5 update issues 2020/2021

Before we show you the best way to solve the WordPress 5.5 update issues, we want to tell you that If you are facing technical challenges with your website after updating to the WordPress 5.5 core version be patient as you are not alone, several users across the globe are facing similar issues.
The developers of the popular content management system on August 11, 2020, in a blog post on its official website, announced to release version 5.5 of WordPress to the public.
According to them, the WordPress 5.5 “Eckstine” in honour of Billy Eckstine has been optimized for speed, search and security to better improve the over 75 million site websites using its system.
Currently, we cannot confirm what is causing the 5.5 core version to break the majority of websites that have been updated but what we know now is some plugins are not compatible with Eckstine, hence the technical challenges. However, we do not recommend uninstalling your plugins.
We some few days ago updated our website WordPress version to the latest version (5.5) but couldn’t add a new post, the “add new post URL” only redirects to a blank page.
How to fix WordPress version 5.5 issues
We do not know which plugin you have installed and which theme you are using but from our experience and what we have gathered so far from experts be rest assured that following our definitive guide will help you fix the issue.
- Degrade WordPress to 5.4.2: The best alternative to fix the issue is to degrade the WordPress version 5.5 to the earlier version 5.4.2 using a plugin called WP Downgrade.
How to degrade WordPress to version 5.4.2
- Download WP Downgrade plugin here or search ‘WP Downgrade’ from the WordPress repository.
- Install and activate the plugin
- Go to settings of the plugin and select the most recent version (5.4.2) you want to degrade to
- Click on update core and the version will be restored as specified.

2. Enable jQuery Migrate Helper: According to experts, this plugin automatically fix broken WordPress plugins and just codes consistently.
“With the update to WordPress 5.5, a migration tool known as will no longer be enabled by default. This may lead to unexpected behaviours in some themes or plugins who run older code.
This plugin serves as a temporary solution, enabling the migration script for your site to give your plugin and theme authors some more time to update, and test their code.”
Installing jQuery Migrate Helper
- Download the plugin from here: https://wordpress.org/plugins/enable-jquery-migrate-helper/#installation
- Using FTP upload to your plugins folder, usually
wp-content/plugins/
. - Activate the plugin on the dashboard plugin screen.
- Voila, be rest assured that the plugin will handle the rest automatically for you
At this stage, your site should be working fine but we recommend for new WordPress users to roll back to the previous version (5.4.2) until the developers of WordPress duly fix the wordpress 5.5 update issues.
However, if you still insist to use the new version of WordPress (5.5), install Enable jQuery Migrate Helper at the appropriate source to avoid ending up downloading malware.