As discussed here: http://camel.465427.n5.nabble.com/Using-Box-component-td5792922.html
the box component is not functioning correctly, and it appears that this is a result of an obsolete version of the box Java library being used.
The latest one is here:
https://github.com/box/box-java-sdk with maven coordinates of
but the one used in Camel is net.box:boxjavalibv2:3.2.1 and has
not been updated since 2014.
It appears that this old library does not work with the current Box REST API.