Today we are going to talk about a problem which most of the people have faced after upgrading their wordpress from classic to block editor. After updating the wordpress version, some users get a common error. “The (block name) block was affected by errors and may not function properly. Check the developer tools for more details”. In this blog, we are going to share how to fix this problem quickly.
When we upgraded the wordpress version for one of our clients website, we also got the same notifications in widget section. While we were trying to customize the theme and add few new layouts for new pages, it became a headache for us.
We immediately started investigating and found that this is a conflict between new wordpress version settings and old wordpress settings. According to a thread on wordpress, it is an old issue and commonly appears due to plugin conflict. You can solve this problem by different methods.
For example:
- Download Classic Editor: This plugin overrides the functions of block editors .
- Removing old widgets: Second suggestion is Remove all the widgets that you are using and add new blocks in the Theme.
- Deactivating the active plugins: Third suggestion is to remove all plugins to avoid the conflict and see if any special plugin is causing the problem. If you are able to locate the plugin, avoid installing it again and look for alternatives.
But these are all old suggestions. In 2026, we are using quick and easy solutions to fix the block errors.
Steps to fix block was affected by errors problem
In order to fix this problem, all you need to do is remove the widgets from inactive widgets section and hit update. Steps are:
- Login to your wordpress dashboard
- Go to appearance
- Choose Widgets
- Under widgets, go to inactive widgets section
- Remove the widgets which are creating conflicts
- Update the section
- Refresh the dashboard and that’s it.
Additional solution – Fix block affected by errors
If the problem persists, check if you have any page builder or theme builder installed such as Astra, Elementor, Divi builder or WP Bakery. Try disabling the builders and it will solve the problem.
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