a fix my BF used was to do the following, worked for me:
Go to Preferences → Sound & Media → Voice, and untick “Enable Voice.”
Relog.
Wait 10-20 seconds, or until the viewer has finished rezzing the scene.
Re-enable voice.
I tried the catwa head. I always have issues getting the skin to match. Catwa and Maitreya Lara don't exactly match no matter how hard I tried it. I use the Mayreal Nadia head. Decent price and easier to match skin on Maitreya. Right now I don't have enough posts to allow image attaching to my posts, but if you can see my forum profile picture. I am using the Mayreal head and Lara body in the picture.