Hi,
Anyone have this problem when you try to withdraw BTC to your own wallet, it won't go through because it says that the bitcoin address is invalid?

Any help would be appreciated,

Thanks,

The current system handling bitcoin addresses does not allow bech32 addresses (starts with 'bc1') as the system lacks complete testing on handling transactions with bech32 addresses.

You can use P2SH addresses (starts with '3') and the system should still try to minimize fees with segwit.