Every time I test or run the app I get the next error: java.net.UnknownHostException:[RedisServer]

I am using CloudDB- I already created a Redis DB (free, I am just doing an university first project to learn how to use this tool). I set the correct DB properties (ProjectID, RedisPort, RedisServer, Token). I am not using SSL. I already implemented blocks to check the user is connected to the internet. Even though I am using CloudDB multiple times in the same Screen, I set the same configurations for all of them.
What can I do to fix this?

Make a small and simple test app to ensure that your redis instance is working, also test with cli

Which provider did you use for your redis server ?

Show your connection settings in designer.

Also if using redisLabs