If the master reservoir was empty, you could very well have an air lock.
I have some universal bench bleeders, but what we mostly use is our fingertip or thumb.
Get a can of water to wash off the fluid. Water neutralizes brake fluid.
Remove the line to the end not working (ONLY), have an assistant slowly, lightly press down on the brake pedal while holding your finger lightly (no spray) over the hole. If you got air, you'll see and feel it.
Halfway down, tell the assistant to "hold", press firmly over hole, have them slowly release peadl.
Do that until it's clear and steady, release pedal, release finger/thumb.
Re-attach line, firmly, crack it oh, 1/4 turn or so, and have him or her re-depress the pedal, tightening and releasing, until the line quits "spitting", rinse all the brake fluid off master and firewall.
Now, do the end that works (to make sure), and report back.
That's how most shops do it, even if they tell you they use a bench bleeder.
Bench bleeding done the same, except a large Phillips screwdriver or push on the clevis with flange mounted in vise.
Dave