PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'variable' doesn't exist

Going to the advanced settings tab (path admin/config/system/backup_migrate/settings-advanced) I get this error message:

PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'variable' doesn't exist: SELECT name, value FROM variable WHERE name IN (:keys_0, :keys_1, :keys_2, :keys_3, :keys_4, :keys_5, :keys_6, :keys_7, :keys_8, :keys_9, :keys_10, :keys_11); Array ( [:keys_0] => backup_migrate_advanced_settings_intro [:keys_1] => backup_migrate_memory_limit [:keys_2] => backup_migrate_backup_max_time [:keys_3] => backup_migrate_verbose [:keys_4] => backup_migrate_disable_cron [:keys_5] => backup_migrate_data_rows_per_query [:keys_6] => backup_migrate_data_rows_per_line [:keys_7] => backup_migrate_data_bytes_per_line [:keys_8] => backup_migrate_max_email_size [:keys_9] => backup_migrate_cleanup_temp_files [:keys_10] => backup_migrate_cleanup_time [:keys_11] => backup_migrate_schedule_buffer ) in backup_migrate_ui_advanced_settings_form() (regel 105 van sites/all/modules/backup_migrate/backup_migrate.advanced_settings.inc).

Clearly the table variable is not surrounded by { and } to cater for the database table prefix.