We tested Smooth Slider on 3 – 4 different servers and it is running fine on all of them. Some users are reporting issue at the time of upgrade, but we have fixed that as well in 2.3.2, but still there is some issue with some servers for database communication. In that case, one can deactivate and re-activate the plugin from plugin admin panel.
In case it still doesn’t work, Just deactivate and delete the plugin from plugin admin panel and re-install it. Once it will install properly on your server, you will not face any issue.
Please share more information like whether you installed SS for the first time or upgraded to new version. So that I can help you with the installation.