It's slang, it's a reference to legumes I think. https://en.wikipedia.org/wiki/Legume

lost potential of wasm not being allowed access to dom

Means like "a crazy thing" in slang, I think.

That is correct. Not sure about all dialects of English but in American English, "nuts" is a slang synonym for "insane". So to say "the whole thing is nuts" could be rephrased as "the situation is crazy".