Problem using sample schemas by Oracle in Oracle APEX
You can unrestrict it.

You just need to run the APEX_SITE_ADMIN_PRIVS.UNRESTRICT_SCHEMA proc.

EXEC FLOWS_XXXXXX.APEX_SITE_ADMIN_PRIVS.UNRESTRICT_SCHEMA(p_schema =&gt; 'SCOTT');


Replace FLOWS_XXXXXX with the name of your APEX schema.

You can also check which schemas are restricted:

SELECT * FROM flows_XXXXXX.wwv_flow_restricted_schemas;


Documentation link.