StaticAssets doesn't work?

Hi, I use StaticAssets to filter in pipeline as follows, but it rerurns nothing. any idea?

    tradable_stocks = StaticAssets([sid('FIBBG000BPH459'),sid('FIBBG00B3T3HD3')])
    return Pipeline(

        screen = tradable_stocks

Unfortunately StaticAssets doesn’t work properly in version 2.8 but will be fixed in version 2.9. For now you can create a universe in the securities master database and then use the Universe filter.