Upon examining the NGNIX logs, the request after login was rejected by NGNIX as the header size limit exceeds.
The login process was failing as NGNIX is rejecting the request because headers (Authorization) sent by the OC is large. The default NGNIX header limit is 4K-8K. We updated the ngnix.conf file with updated configuration as below to support the Header successfully sent from browser --> ngnix --> OC Server.
proxy_buffers 40 1024k;
After updating the ngnix configuration, as mentioned above, fix the issue enable to access the OC over Load Balancer URL.