Can't finish Clothing Too walkthrough

Running 4.16.2

Using a mesh (made by someone else on free3d), I remade half of the skeleton, and added a cape and a l/r_cape bone for it (where the left half of the cape is weighted to l_cape bone and the other half to r_cape bone). The cape is part of the same character mesh.

Following the cloth walkthrough here

I’m getting stuck at step 1 and 2 on Paint Clothing Weights.

Clicking on the Clothing asset, the clothing asset drops to the floor, and I can’t paint it.

Here’s a pic of what it looks like.

I realize this is experimental, but a guy on youtube got it to work somehow.
Any help would be much appreciated!

Updating to 4.17.3 preview fixed it!