The issue had to do with encryption in Elasticache (Redis). I originally had the “Transit encryption mode” set to Required. By switching it to Preferred, the error no longer appears and the deployment goes smoothly. I expected the server to throw an error when it’s initializing the modules/configuring the Redis pubsub if there was an issue, but instead it just timed out whenever a graphql query was dispatched.
I’ve written a step-by-step deployment guide for launching Speckle in AWS for my company to use. I’d like to post it if you think it’d be helpful for others.
Thanks @iainsproat !