the support for that /lib folder is broken in 6.2.0, but fixed in the 6.2.1 RC
the deploy folder doesn’t support jars
if the jar in on maven, it’s better to add a {javasettings:{[maven: [ .... ] }}} to your cfconfig (like for component) so Lucee will automatically download the jar itself into the lucee\tomcat\lucee-server\mvn folder