Error: Response closed without headers


I have been following the flow quick start tutorial , however whenever I try and execute a transaction against the testnet then I get the error: Error: Response closed without headers. Running the same transaction locally in the emulator seems to work just fine. For more context here is my environment:

Node: 12.20.0
@onflow/fcl : 0.0.70
flow CLI: 0.20.2

I have also tried using both testnet URLs : and (with https) and neither of these work. Is the testnet currently down?

@moon_tony Check here: