Why no fluid comes out of bleeder?

the valve is probably corroded or there is sediment in the line and settled inside the bleeder.

Remove the bleeder all the way and see if you get any fluid. be ready to re install the bleeder as you get fluid flowing. If you do not pump the brake pedal with the bleeder out you should be able to replace the valve with a new one quickly then bleed the brakes so get the air out.