Problems with launching game

[tonydean2]

Hi I have recently started getting an error message on launch of Assetto Corsa. It reads "Unknown error has caused Assetto Corsa launcher to retire from race". I have not had any problems before with launching AC.I was wondering if anyone else has come across this problem and if so what they did to rectify it. This is absolutely my favourite sim and I'm missing it so any help would be much appreciated. Thanking you all in anticipation of any assistance