I have two things to say.
1. Please "carefully read and learn to understand" all the instructions that are available at
www.projectai.com before proceeding to adding AI traffic or trying to use AFCAD.
2. Such development and process is always tedious and the only way to avoid such error messages is to always back track and figure out what you have done wrong by re-reading the tutorials over and over again.
3. Are you sure you are at the right airport? Most AI airliners are only shown in places that they represent. For example: British Airways is mostly seen in Britain and vice versa.
4. We ask that you stop posting multiple threads regarding the same topic over and over again as it can pee off the moderators.