The simplest way to deal with this problem is by resetting the permalinks structure:
Navigate to your WordPress Dashboard. Go to Settings > Permalinks.
Select an alternative permalinks structure -> Save Changes. For instance, if you’re currently using the Day and name settings. Change it to something else, like Post name.
- Once done, change it back to your standard structure and hit Save Changes once again.
2. Disabling Plugins
Deactivate the most-recently installed or updated plugin that might be triggering the error. Otherwise, you can also remove all the installed plugins altogether:- Go to the Plugins menu in your WordPress dashboard -> Installed Plugins.
- Click the Deactivate button next to the plugin’s name.
- Once finished, reset the permalinks structure using the previous method.
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