Two choices. From the above link:
Seems the latest 'update' to libwww-perl broke things that used to work . . .

Solution 1: downgrade libwww-perl to an older version.

. . . this has to do with utf8 stuff in the content . . .

Solution 2: make sure there's no "utf8 stuff in the content". Looking at your $query I see '...' a couple of times, not as three dots but as a single ellipsis character. Try changing those first; if no joy then keep searching for non-ASCII characters.

In reply to Re^3: Error "HTTP::Message content must be bytes" while posting with LWP by keszler
in thread Error "HTTP::Message content must be bytes" while posting with LWP by Gangabass

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