Runtime Error 91 Need Help Desperately

Have no idea how to get around this. Haven't been able to work for a week because of.  Put in new hard drives, new Win 10, and still can to get past it in Corel,  Have changed permissions for file.  Still, a problem, found an article in Corel about setting block and variable, totally makes no sense and I have no idea where to go to do what it says.