Nokogiri vs SU2018

Thank you for yor suggestion.
Please note

  1. I used roo for almost one year under SU2018 without any problem on my old PC.
  2. It seems that the a good solution could be if I upgrade to SU2019.
    This the hottest topic nowdays. I am as much confused about this as most of the average SU users.
    (I just renewed, 4 days before the announcment of the new licensing structure, my traditional supscription. )
    I have the very same problem as Michael
    Updating Licence for 2019