Crash on Bake Selected

Hello - I need help here. I am at a standstill. I have been baking lighting all morning, no problem. Then, out of nowhere, it crashes every time I Bake Selected on a new object.

I check the editor log, and here are the last lines:

tlsf_create: Pool size must be between 3208 and 1073745020 bytes.

Crash!!!

What does that mean? Googling it leads to only a few answers and they're dead ends.

Am I doing something wrong?

I made a duplicate scene and cleared all baked lighting. Suddenly, it begins to bake again. What's going on?

If relevant, I had about 20 objects baked at default settings except for maxed AO, and I made the resolution 200 for each (it's so blurry otherwise).

I cleared all of the lightmaps and redid it. Seemed fine. Then the second I baked a single cube, a wall, it crashed again!