Most likely you haven't unlocked the ANONYMOUS account:

Installing Application Express and Configuring Embedded PL/SQL Gateway

1. Enter the following statement to unlock the ANONYMOUS account:

   ALTER USER ANONYMOUS ACCOUNT UNLOCK; 

Have you unlocked the ANONYMOUS account in the CDB? If not try that.

Also I notice that you are trying to connect to APEX on port 8888, is that the port you have configured? The default would be 8080.

I have the same basic authentication dialog on XE 18c on the Enterprise Manager Express Dialog when I enter the name of a container database in the third login field. does that function (without Apex) really need anonymous user as well?

Hi Bernd,

please connect to your root container CDB$ROOT as SYS and execute

execute dbms_xdb_config.setglobalportenabled(true);

This should solve your issue

HTH

Markus

Thanks Markus Flechtner you are correct, That was confusing, I had the same problem with the OraEE Docker container. It should not show the field in the login mask if it is turned off.

I guess setglobalportenabled(true) and localaccess(false) should be mentioned in the quickstart faq. (And probably flash to avoid disapointed users:)