CUPS returns "Unsupported format" error

Solution Verified - Updated -

Issue

  • When I try to lp a plain text file, I get the error "Unsupported format 'text/plain'!"
  • When I try a test print, I get the error "There was an error during the CUPS operation: 'client-error-document-format-not-supported'".

Environment

  • Red Hat Enterprise Linux (RHEL)
  • Common Unix Printing System (CUPS)

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