vapor locked..is this a thing?

[doofus]

I saw this ad..always browsing CL for cheap cars. I’ve heard of vapor lock on old cars-like from the 60s-but it was something else. I’m not sure what this is referring to (“gas tank is vapor locked..will only take on a minimal amount of gas”). Anyone have an idea of what might be going on here?

https://newyork.craigslist.org/lgi/cto/d/1998-mercedes-e320/6501412833.html