Which sentence contains a prefix error?

In the sentence that has the prefix error, the phrase "pre and post meeting reports" is incorrect due to the lack of a hyphen between "pre" and "meeting." The correct construction should be "pre- and post-meeting reports" to properly denote that "pre" is a prefix modifying "meeting." When a prefix is used in this manner to form compound adjectives, hyphenation helps clarify that the terms are connected in their meaning related to "meeting reports."

The other sentences do not contain any prefix errors and are correctly constructed as they convey their intended meanings without ambiguity.