Hey @chappie1998! I can see that you’re using a custom toolchain to use forc v0.55.0, the official beta-5 toolchain on supports forc up to v0.49.3.
The problem you’re facing is simply because the testnet release is not ready yet and theres a version mismatch. On top of that there is no faucet for the devnet so you wouldn’t have any ETH to deploy with.
Good news is that all of these things are coming very soon in the next couple of weeks. i.e. The PR here:
As always appreciate your patience and you being here @chappie1998! 