I have downloaded SDL Trados Studio 2019 and for the first day it worked. Since then, I have been unable to do anything. Whenever I try to confirm or save a translation, I get the error message ¨Object reference not set to an instance of an object.¨ I basically can´t do anything with this program. I am using Windows and would like to get some help so I can use this program the right way. What should I do?