MIME Types with Charset in HTTP Policies - Error when defining a charset

Hello all,

If you define an expression in the gateway firewall policies in a HTTP policy that contains e.g. the download mime type “text/plain; charset=utf-8” as a value, this is declared as incorrect: “Provide a valid Mime type”.

The problem only occurs if you define a charset for a mime type.

Does anyone have the same problem or a solution?

Best regards