You should make sure that you have the original track installed first and them my update.
I'm assuming that whatever file is missing is in the original track.
My work is only a texture update and needs the original to run.
Original track:
https://www.racedepartment.com/downloads/azerbaijan-grand-prix.15893/
Comment made by user:
https://www.racedepartment.com/threads/azerbaijan-grand-prix-baku-city.150009/#post-2738097
Page edit:
Just looked, the gmt file is located in the original.
As stated on my page:
Installation notes:
- You will have to download the original track first which can be found here:
https://www.racedepartment.com/downloads/azerbaijan-grand-prix.15893/
Yes I should've read it before going to the game files... Thank you