Gradient layer doesn't move

Hi

I just saw a video where someone created a gradient fill layer and then immedaitely moved it. I'm doing the same and it doesn't move. Nothing happens. Someone suspected I might be trying to move the mask by accident. No, I even deleted the mask and tried, same thing.

Related or not, if I try the Transform tool on this layer I get this error: "Could not transform because the initial bounding rectangle is empty"

Once I deleted the mask I didn't get this error message, but nothing happened. It didn't open the Transform.

I checked other layers to make sure everything is working.

I also just updated to 2020... so I opened the same file in 2018 to check... exactly the same problem.

I'm probably missing something silly...

Thanks!