Redis::CannotConnectError: Error connecting to Redis SocketError: getaddrinfo: nodename nor servname provided, or not known

I'm getting the above errors when I try to run rails db:seed, which uses Sidekiq to enqueue jobs for database generation. I've been trying a variety of fixes related to getting/setting the correct REDISCLOUD_URL variable without success.

My redis.rb file looks like this:

$redis = Redis.newurl = ENV["REDISCLOUD_URL"]if url  Sidekiq.configure_server do |config|    config.redis = { url: url }  end  Sidekiq.configure_client do |config|    config.redis = { url: url }  end  $redis = Redis.new(:url => url)end

I'm sure the solution will be something to do with resolving SocketError: getaddrinfo: Name or service not known, but having spent many hours trying to fix this I'm still stumped. Any help would be greatly appreciated!