GBTC holdings -- something looks way off

https://www.bitcoinstrategyplatform.com/etfs

Shows an outflow from Grayscale (GBTC) of ₿264,925 yesterday, which makes their holdings ₿0.

This must be some kind of error? Anyone familiar with Grayscale's outflows and holdings?

EDIT: According to Arkham Intelligence their holdings are still: 276.875K BTC