"user does not exist " when calling DBMS_LOGMNR.START_LOGMNR

I have a CDB user called "MYADMIN" and I'm trying to make it connect to log miner. -- enable calling admin username on CDB ALTER SESSION set "_ORACLE_SCRIPT"=true / -- create unique table space for admin CREATE TABLESPACE myadmints DATAFILE '/path/to/admints.dbf' SIZE 20M AUTOEXTEND ON / -- create admin user on CDB CREATE USER myadmin IDENTIFIED BY P@ssw0rd DEFAULT TABLESPACE myadmints QUOTA UNLIMITED ON myadmints ACCOUNT UNLOCK / -- allow access to all PDBs to the admin user ALTER USER myadmin SET CONTAINER_DATA=ALL CONTAINER=CURRENT / -- grant needed permissions GRANT DBA to myadmin GRANT CREATE SESSION TO myadmin GRANT CREATE TABLE TO myadmin GRANT EXECUTE_CATALOG_ROLE TO myadmin GRANT EXECUTE ON DBMS_LOGMNR TO myadmin GRANT SELECT ON V_$DATABASE TO myadmin GRANT SELECT ON V_$LOGMNR_CONTENTS TO myadmin GRANT SELECT ON V_$ARCHIVED_LOG TO myadmin GRANT SELECT ON V_$LOG TO myadmin GRANT SELECT ON V_$LOGFILE TO myadmin GRANT RESOURCE, CONNECT TO myadmin I've selected one line from 'v$archived_log' and trying to load the file.

BEGIN
  DBMS_LOGMNR.ADD_LOGFILE(LogFileName=>'/path/to/archive/ARC000011_1061542581',Options=>DBMS_LOGMNR.new);
  DBMS_LOGMNR.START_LOGMNR(StartScn=>3083464, EndScn=>3388245, Options=>DBMS_LOGMNR.DICT_FROM_ONLINECATALOG+DBMS_LOGMNR.NO_ROW_ID_IN_STMT);
END;

I can run it from the sys as sysdba user, but when I run it from my "myadmin" user I'm getting: Error report - ORA-01435: user does not exist ORA-06512: at "SYS.DBMS_LOGMNR", line 72 ORA-06512: at line 3 01435. 00000 - "user does not exist" *Cause: *Action: The error is about the START_LOGMNR line when I remove it there is no error. Which privilege I'm missing?