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Sometimes it may be necessaryDisable all plugins, but you cannot access the admin screens to do this. You can deactivate all plugins using one of two methods.
Deactivate all plugins using phpMyAdmin.
In the wp_options table, find the active_plugins row under the option_name column (field)
Change the option_value field to: a:0:{}
Alternatively, reset your plugin folder via FTP or the file manager available in your hosting control panel. This method preserves plugin options but requires manual reactivation of plugins.
Via FTP or your host's file manager, navigate to the wp-contents folder (directory)
Via FTP or your host's file manager, rename the folder "plugins" to "plugins.hold"
Log in to your WordPress Manage Plugins page (/wp-admin/plugins.php) – This will disable any “missing” plugins.
Via FTP or your host's file manager, rename "plugins.hold" to "plugins"