[Xgen] Failed to evaluate subd

[henriquegustavo]

Hello guys,
I'm trying to paint density mask on my mesh but it is not working properly.
Now I've notice this error, don't know if it is related to masking...
Do you know how to fix it?

[Christoph_Schaedl]

Does the mesh have clean uvs?

Is smooth preview turned on?

[henriquegustavo]

Yes it has!!
I'm using smooth preview!