The 'maxPostSize' value is the maximum size in bytes of the POST that will be handled by the container FORM URL parameter parsing. Limit its size to reduce exposure to a denial-of-service attack. If 'maxPostSize' is not set, the default value of 2097152 (2MB) is used. Security Token Service is configured in its shipping state to not set a value for 'maxPostSize''.
Navigate to and open /usr/lib/vmware-vsphere-ui/server/conf/server.xml. Navigate to each of the <Connector> nodes. Remove any configuration for 'maxPostSize'.