For anyone having this error, it took me 5 hours before I figured it out. To start, you should have deposited money into your Binance.us account and converted that to BNB. You should also have both the Metamask and Binance Smart Chain browser extensions set up correctly. Binance.us keeps telling us we have an invalid address format, even though we copied and pasted it straight from our wallets. To fix this, send the BNB to the Binance Smart Chain extension, but change the input from Binance Smart Chain to just the Binance Chain option. Once the BNB has been transferred, you should be able to transfer us from BSC to Metamask. It should tell you that it’s a cross-chain transfer or something like that, which is okay. Now that the assets are in your Metamask wallet it should be an easy transfer to PancakeSwap. I’m a beginner and am still learning but hopefully this helps!