Hi Hedmond,
You can complete the WLSDM wizard by applying the solution below for the error you receive.
Solution:
WebLogic AdminServer port use which is pointed in below screen capture.
7ca7a3fd-932d-4302-96a7-f9274116909c-image.png
• Go to AdminServer > Protocols > General and increase the “Maximum Message Size” to “100000000”.
776232d7-7fda-4e92-bf70-3a854e221fc2-image.png
• Then click the HTTP section and make sure “Max Post Size” is “-1”.
e05ee5a3-9dbd-4d8e-9e8d-97df6562668c-image.png
Finally, activate your changes, restart the AdminServer and try to complete WLSDM Installation Wizard again.