Oracle DBCA Error - Unable to check for available memory

Hello fellow Oracle enthusiasts,

      I've been following the installation guide for Oracle 18c on OEL Linux 7. When I create the database using dbca, I run into the following error codes (DBT-50000 and DBT-11211). The system has 24GB available for memory.

I also checked all the kernel parameters which were configured by the pre-installation task and I met all the minimum requirements.

One of my initial attempts to solve it was through a solution I found on the net. It suggested to add the -J-Doracle.assistants.dbca.validate.ConfigurationParams=false parameter to the /etc/init.d/oracledb_ORCLCDB-18c file. I also tried adding it to the command line call of dbca.