datapacks acting up

So, I've updated my mod from 1.16.5 to 1.18 and now, when I try to make a test world, the game is like "this is a test world" and it tells me I can either go back to the title screen or start the world in safe mode, but when I click the safe mode button, nothing happens. So I've checked some stuff and when I go to the datapacks part of the new world it says that the default and forge datapacks are outdated. I've even updated MCreator since the time it started, but the problem remains.

I've already made a topic about this, but it was not an official bug report and someone said they have the same problem, so I figured I'll make the bug report post.