This makes my head hurt.

Try
16 oz White flour
9.5 oz water
6.5 oz starter

Knead for 2 minutes, add 2 tsp salt.
Knead for 10 minutes.
Rise 2-4 hours until doubled in size which is probably 4x in volume.

Form a boulle or loaf. Put it on parchment or aluminum foil. Let rise 1-1/2
hours at 80-90F.

Slash the loaf with a bread knife because it works. On a stone that has been
preheated to 500 frigging degrees F, slide the loaf. At the risk of hurting
yourself put a preheated iron skillet under the stone and put 1/2 or more cups
of boiling water into the pan. It will burn your knuckles. Enjoy it. Bake
for 5 minutes at 500 then reduce to 425F for 20-30 minutes. Let it get darker
than feels comfortable.

This may or may not have worked. Next time adjust water to get a better
consistency.

Ed