I had no problems creating a BBP only stake. Thanks for the referral reward, Rob!
Now I'm trying to create a BTC stake, but when I paste the BTC address I copied from Trust Wallet, bc1q08tkcyac8dzwm5wzxacy898g2fu69nsj2kf7fc, Portfolio Builder says "Address invalid." when I click on either "Submit" or "Query UTXO." Why isn't this working for me?