I got the same error too. It looks like liquibase cannot find snakeyaml jar on the classpath for some reason.
Another problem is that I need to explicitly set classpath for the driver. Placing the jar in the lib directory doesn't help at all contrary to what readme.txt says.
Another problem is that I need to explicitly set classpath for the driver. Placing the jar in the lib directory doesn't help at all contrary to what readme.txt says.