Some VMware Appliances use SUSE Linux Enterprise Server 11 as the underlying Operating System. General support for SUSE Linux Enterprise Server 11 ended on March 31st, 2019.
Resolution
VMware has extended support from SUSE to continue to provide needed patches to any supported appliances still running SUSE Linux Enterprise Server 11. As Appliance support continues, many Appliances will migrate to VMware's Photon OS.