Good evening. As reproted by Nishant Shukla on 06/05/2020 , I'm also facing the same issue. attached are the files that I have created successfully the user for oracle DB and the lsnrctl services info. I have tried so many options , but unable to success. When I go through the forum I'm unable to find the solution. Please help me to proceed from this step.
Attached is the screen shot for dba user success connect through SQL plus
InstructorPriyanka Replied on 29/09/2020
Try to go with different service names and port numbers accordingly from lsnrctl services