Checking the Forum, this issue might be related with the verify the AGS Files that are linked within New World. Follow this troubleshooting:
Windows + R type in %APPDATA%
Go to Local and Roaming (Both files will include an AGS file) and open them.
Rename the AGS sub-folder ‘‘New World’’ to something different like ‘’_New World"
This will refresh the cache files within New World and remove the error within the character not loading.
A previous Forum I was working with a another players, we found the only solution for this launching error with the character list was this troubleshooting, you can check this Forum with this link: Main Menu buttons don’t work + character/Worlds wont load . It also have another possible troubleshooting there.
Please let us know as soon as possible if after these troubleshooting the problem persist.
Thanks for all your feedback and specially your patience.