If you get errors when copying, export, or open in spreadsheet like any of these in DbVisualizer 13, this may happen if upgrading from a previous DbVisualizer version. The solution is to install DbVisualizer in a new empty folder.
Could not initialize class com.onseven.dbvis.rb.l
class y.view.s can not implement y.view.yf, because it is not an interface (y.view.yf is in unnamed module of loader 'app')
java.lang.VerifyError: Bad type on operand stack