I'm using Windows 11 and Oracle SQL Developer 23.1.
When I get the path for DATA_PUMP_DIR, it contains forward slashes ('/') before the last folder path, this is common for unix to use forward slashes, but windows uses: back slashes ('\') for file paths or UNC.
This affects using the Data Pump import wizard using the default DATA_PUMP_DIR path.
Workaround is to set the “MY_DIR” path for the current user/schema.