This isn't really an issue, it's just that I installed Minecraft Forge 1.17.1 but I can't find any 1.17.1 file for download for the create mod. Below are some links I am using:
You could scroll a bit down on the website you linked and read:
Create 0.3.2 on 1.16.5 is our latest available version.
Currently, preparations for a 1.17 port are being made, though the actual porting work cannot begin until all dependencies have been updated.
