I got this again from a different route, this time I did this (approximately):
Tara dom. Sleepover with Des. Help Eva cheat. Invite Eva to live at home. Shopping with Des and claim her. Go to party with Des and Eva. At party go with Rebecca. Don't have sex with Rebecca and look for Des. Eva finds Viv and then Des with huge fight. Viv stands between them and tells the truth and Des runs away with a broken heart. Viv follows Des. Viv gives a gift to Des in art studio and both get nude. Eva explains from her pov what happened between Des and Eva. Viv goes to see Des and they talk about what happened. The error message comes.
By the way, I really love that route, because both Des and Eva gets to show their vulnerable side. And the writing is good throughout.