Make sure the Grid Node version matches the same version and build of CCA that is installed on the CCA Primary Server and other Grid Node versions.
Check the following file on the Grid node server.
/Program Files/CA/CCA Grid Node/lib/caacm-core.jar
/Program Files/CA/CCA Grid Node/lib/caacm-api.jar
Make sure the date and size of the file matches the same file on the CCA Server.
/Program Files/CA/CCA Server/tomcat/webapps/ROOT/WEB-INF/lib/caacm-core.jar
/Program Files/CA/CCA Server/tomcat/webapps/ROOT/WEB-INF/lib/caacm-api.jar