Thanks for working out which plugin it was.
While the multiview plugin comes with Opus, it acts as a way to use third party viewers which aren't part of Opus. The crash will be happening in that third party code, so isn't something we can fix directly, but there is a way to get access to the same/updated viewers via a newer mechanism which should work better.
The multiview plugin is a 'legacy' thing these days, and you can gain access to the same viewers in Opus via the preview handler which comes with newer versions of Quick View Plus. (Forum thread about it here.)