What is the OpenLink PostgreSQL ODBC driver you downloaded and works on presumably your local Linux test machine ?
We would need to know the Linux glibc version with the command:
rpm -qa | grep glibc
to know which driver to use on Virtuoso AWS PAGO AMI, but I suspect it will be a glibc2.17 system ie
[hwilliams@ip-10-228-66-119 ~]$ rpm -qa | grep glibc
In which case you can use our PostgreSQL 9 Linux glibc2.17 ODBC driver from that link … or the glibc2.5 or 2.12 driver would work as it is compatible with later glibc versions …