Hello
I am currently trying to install GridDB on an Ubuntu 20.04 system; but I am running into an issue during the installation process. When I try to connect to the database after installation, I receive the error message: “Error while connecting to database: Connection refused.” I’ve followed the installation guide closely, and the installation steps seem to complete without any issues. 
However; I can’t get past this connection error, even though I confirmed that the GridDB services are running.
I have checked the configuration files and tried restarting the server multiple times, but the error persists. 
I have checked GridDB Quick Start Guide java guide for reference .
I also verified that the firewall settings and network configurations are correct. Can anyone provide insights on potential solutions or common installation errors that might lead to this issue? 
Any help would be greatly appreciated!
Thank you ! 