Attached is a screen shot of the relevant portion of the schematic of the WT32i development board where they have that external codec plugged in. It's part of their zip file of the full design documents for the development board at this link: https://www.silabs.com/documents/login/reference-designs/DKWT32i-v2.2.zip

I wonder if I have blown one of the caps in that ladder that connects to its power inputs. I don't see anything visibly physically wrong, everything looks OK there.