Could you please export your project and share it with me? Without any passwords, of course. Also, the screenshots you provided are too small for me to be able to read it. Could you provide me with some larger ones? Preferably with the "Edit Hadoop Connection" window visible. There should be stack traces of errors from the screenshots in Designer's Error log (Window -> Show View -> Other... -> General -> Error Log). Please attach them too.
By the way, you mentioned you use Cloudera 4.3.0. But this is what our documentation states:
There are two officialy supported versions of Hadoop: Cloudera 3 update 5 and Cloudera 4 version 4.1.2. Other versions close to this one might work, but we cannot guarantee that.