Problem with Flask+celery+redis deployment on EB and ElastiCache

Hello, I am currently trying to deploy an app on Elastic Beanstalk with some background task with celery and Redis as Broker. In my research of how to do it I followed some recommendations given at:

https://stackoverflow.com/questions/30424167/deploying-flask-app-that-uses-celery-and-redis-to-aws-elastic-beanstalk-or-ec2

The deployment of the App works without problems, but the connection with ElastiCache with Redis is not working, the application send the task to the worker, but I don't know why is not working. I followed all the steps and configured all the things required but it's not working. Here I add some logs eb logs that helps, but I dont know how to fix it.

2023/07/26 22:28:10.294633 [INFO] Executing instruction: RunConfigDeployPostDeployHooks
2023/07/26 22:28:10.294695 [INFO] Executing platform hooks in .platform/confighooks/postdeploy/
2023/07/26 22:28:10.294722 [INFO] The dir .platform/confighooks/postdeploy/ does not exist
2023/07/26 22:28:10.294726 [INFO] Finished running scripts in /var/app/current/.platform/confighooks/postdeploy
2023/07/26 22:28:10.294732 [INFO] Executing cleanup logic
2023/07/26 22:28:10.294839 [INFO] CommandService Response: {"status":"SUCCESS","api_version":"1.0","results":[{"status":"SUCCESS","msg":"Engin
e execution has succeeded.","returncode":0,"events":[{"msg":"Instance deployment successfully generated a 'Procfile'.","timestamp":16904104814
57,"severity":"INFO"},{"msg":"Instance deployment completed successfully.","timestamp":1690410490294,"severity":"INFO"}]}]}

2023/07/26 22:28:10.295013 [INFO] Platform Engine finished execution on command: config-deploy

In my local machine the app works without problems. Also, I tried to increase idle Timeout for the LoadBalancer through .ebextensions files, but any changes works on it. Those are major problems that searching I can't be able to find an answer. Any help will be grateful. I share the repository of the project if it's need it some more information of the App. Repo.