mPDF support:

  1. Download mPDF from https://github.com/mpdf/mpdf/releases.
  2. Extract the contents of the downloaded package into one of the
  supported paths.
  3. If using mPDF 7.0 or later don't forget to run 'composer install' in the
  mpdf directory.
  4. Check https://mpdf.github.io/ for further information.
