That's good that Prodigy was installed correctly so you can begin using Prodigy via terminal.
Someone had success with to modify the host on the prodigy.json to "0.0.0.0":
If this is successful, then you will want to follow these instructions to modify your prodigyConfig:
Last, could there be some AWS firewall or rules to modify?
If this doesn't help, since you were able to get it to run one time, it may be worth a try to rebuild your instance. Hopefully it isn't too inconvenient.
Let us know if you come up on any further questions or if you're able to get this to work!