Is GBTC not tradable on Alpaca?

I am getting errors when trying to get asset information using the API. So just wanted to know if there is an issue with this asset on Alpaca platform before proceeding further.

GBTC Grayscale Bitcoin Trust (Btc) trades ‘over the counter’ as OTCMKTS: GBTC. Alpaca generally only considers equities listed on a US exchange as tradable. I say ‘generally’ because customer support can manually place orders to liquidate OTC stocks in one’s account. This can happen if a held stock is delisted.