Bucket Name list is empty in Data Pump Import dialog box

Hello, I has tried to import direct pump (dmp) file to my autonomous database. I already have this dmp file in my bucket (object storage).

So problem is, when I try to select a "Bucket Name" from a list in Data Pump Import dialog box, I got an empty list box and an error in left bottom corner of screen. See my screenshot:

And when I press this link at the left bottom corner, I see this:

Before I try this, I have done all instructions from: https://docs.oracle.com/en/database/oracle/sql-developer-web/sdwad/importing-data-using-data-pump.html#GUID-AA9DD625-F3CC-4FC8-A3E9-B9F8F9F40D67