The CA Cert configured in the master.ign does not match that configured in the Load Balancer (api-int). Note that the Load Balancer must be configured for Layer-4/TCP/Passthrough so that the certificate from the backend server (bootstrap) is presented instead of the certificate configured specifically on the Load Balancer. See documentation regarding configuring Load Balancer for Layer-4.
Also verify that the Load Balancer is configured so that TCP port 22623 reaches the TCP port 22623 on the backend.
Please be aware that previous installation attempts can leave expired temporary certificates on the OpenShift Container Platform Master servers. Before attempting a new installation, either shut down all OpenShift Container Platform Master nodes or re-provision the OpenShift Container Platform Master servers.