In the pdi.log file there's a line saying:
Unable to find datasource by JNDI name: dwp
It previously says that it can't find the library dbjodbc16, but maybe there's something wrong with the configuration of JNDI connection first.
What do you have in your ~/data-integration/simple-jndi/jdbc.properties file? That is where the JNDI connection dwp should be configured, you should have something like: