If you can access your dashboard, deactivate all the plugins and activate it one by one, and check your website. If you are not able to access your WP Dashboard because of this error. Go to your hosting Cpanel > File Manager > Public_html > wp-content, rename the plugin folder, and then check your website.
Go to Dashboard > plugins, you will see all your plugins have been deactivated. Again goto Cpanel and rename the plugin folder to its original name “plugins”.
After that, go to your Dashboard > Plugins > and activate it one by one.