The "8231" part is bound to be a value that depends on the particular data being given to the script (that is, it refers to the offset from the beginning of a string or file). The part you want to google for is "Did not find leading dereferencer, detected at offset".

When I put that in the search box, the first significant (informative) hit turned out to be the source code for Text::Balanced. So that's where the particular message came from. (It's unlikely that another module would use the exact same wording.)