Hey, I just had the same error.
The only solution is to access your database (using phpmyadmin for example).
In the table ‘wp_options’, search the option where the field ‘option_name’ is’AddActionsAndFilters_Plugin_code’.
The ‘option_value’ field of this record contains the code written in the plugin ‘Add Actions And Filters’.
You can edit it there and remove the lines that caused the fatal error.
