We have checked your redis issue and redis is working fine on our end with this server configuration.
- redis = 5.0.3
- RAM = 2GB
- OS = ubuntu 18.04LTS (Debian)
We recommend to use redis as both CACHE_DRIVER as well as SESSION_DRIVER for bagisto, therefore you need to modify your .env accordingly setting CACHE_DRIVER = redis, SESSION_DRIVER= redis
After any modification in .env, remove <bagisto_root>/bootstrap/cache/config.php file and then flush the bagisto previous configuration, cache and route by "php artisan config:cache", "php artisan cache:clear", "php artisan route:clear".
Also check for the predis is installed properly by composer if not then run "composer require predis/predis" in bagisto root directory.
Thanks and Regards