"Ran out of memory" system error

Please see the screenshots. I’ve tried a bunch of different variations for compiling, and none of them working. I was able to compile a number of times before, but can’t now. I don’t think this would make a difference, but I’m also trying to add page breaks. But whether I choose this option or not, I still can’t compile.

Each time I try to compile, I either see system errors, or the Scrivener program simply shuts down.

UPDATE: I’ve just now re-started and tried again. I was able to compile all file types except for the .docx file. Why would that be an issue?

Also, why don’t the chapter names show up at the top of each chapter in the compiled manuscript?

ran out of memory.JPG