При использовании HTTP Server при переходе на пятую версию нужно добавить новые параметры dads.conf:
https://docs.oracle.com/cd/E59726_01/install.50/e39144/http_server.htm#HTMIG29474 PlsqlPathAlias and
PlsqlPathAliasProcedure are required new parameters that must be added to an existing DAD. This is important when upgrading to Application Express release 5.0.
https://docs.oracle.com/cd/E59726_01/install.50/e39144/http_server.htm#HTMIG29474 Alias /i/ "ORACLE_HTTPSERVER_HOME/user_projects/domains/base_domain/images/"
<Location /pls/apex>
Order deny,allow
AllowOverride None
PlsqlDatabaseConnectString host:port:service_name ServiceNameFormat
PlsqlNLSLanguage AMERICAN_AMERICA.AL32UTF8
PlsqlAuthenticationMode Basic
SetHandler pls_handler
PlsqlDocumentTablename wwv_flow_file_objects$
PlsqlDatabaseUsername APEX_PUBLIC_USER
PlsqlDefaultPage apex
PlsqlDatabasePassword apex_public_user_password
PlsqlRequestValidationFunction wwv_flow_epg_include_modules.authorize
PlsqlPathAlias r
PlsqlPathAliasProcedure wwv_flow.resolve_friendly_url
Allow from all
</Location>
