Error On Demo Open World

I recently resized the texture of the open world demo in order for my computer to work (mostly 1024 and 2048 instead of 8k)
Every texture works except the ones with alpha such as the flowers and the plants (the alphas are not present), I don’t know what I did wrong…
Also, the threes have a weird green color on them, I’m not sure on how to act.
Thank you!