There are not currently any low-cost airline routes between Bologna (Guglielmo Marconi) and Bordeaux with MyAir.
Instead you could try browsing budget flights between Bologna (Guglielmo Marconi) and Bordeaux with all airlines.
Another option would be to try browsing all low-cost airline routes to Bordeaux or all budget routes from Bologna (Guglielmo Marconi).
In the meantime, this error has been logged.