[2021] Crush when clicking the Create Trade Route button

Hello wildtempest2021 thank you for your post and welcome to the forums.

To try and resolve this quickly, I would first ask you to try lowering the in-game settings, and use DirectX11 in the menu, to see if this will stop the crash when using the Create Trade Route option.

Should that not fix the issue for you, please try all of the following steps one by one >

- Run all of the games .exe files as an administrator. Locate the .exe file, right-click on the file, select Properties, select the Compatability tab, select Run as administrator, select Apply then OK.
Not running as a game as Admin can cause several problems > https://www.ubisoft.com/help?article=000060505
 
- Update your GPU drivers and Windows OS to latest version (Windows 10 update currently Update 21H1) (If using Nvidia, the latest 472.12 driver released on the 20th September )
 
- Disable all background software in Task Manager and try a clean boot/restart of your PC, in case any software is interfering with the game -
https://support.ubisoft.com/en-GB/Article/000063761
 
- Make a backup of the games config/settings file, then delete this file in case a recent change to the settings may be causing the game to crash (Changing the recommended graphics/video/monitor settings in the game, can sometimes prevent the game from launching)
 
- Install the game to another HDD or SSD drive preferably, if available. Also try installing the game on a separate hard drive as your Windows OS (Make sure to back up any game save files onto your desktop first, just in case)
 
- Temporarily use a hardware monitoring program with an onscreen overlay, to see if there is a sudden spike in your CPU or ram usage whilst playing, that causes the game to crash

This support article should explain how to perform some of these solutions -
https://www.ubisoft.com/help?article=000061047
 
Please let me know if you need any help with the steps above and I will happily explain further.