# `Plug.Conn.InvalidQueryError`
[🔗](https://github.com/elixir-plug/plug/blob/v1.20.3/lib/plug/conn.ex#L283)

Raised when the request string is malformed, for example:

  * the query has bad utf-8 encoding
  * the query fails to www-form decode

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*Consult [api-reference.md](api-reference.md) for complete listing*