Error using filter option in the compound operator in the search stage

I am trying to use the filter option in with should option in the compound operator. I am getting the following error: ```This analyzer is expected to produce exactly one token, but got many`. What could be the cause?

Hi @Yashasvi_Jain , can you provide the $search query you are running and the index definition in a Search Playground environment? You can click Share to generate a shareable URL.