I have configured the GoldenGate 12c Replication Process, and all the processes are running: Extract, Data Pump, and Replicat. When I add a new record or change an existing record in the source it does not get migrated to the target. When I look at the Extract using Info Extract Detail, I get in the message that the Extract Source is not available: See Below

What is causing the issue?. I updated the database to make the logs available to the Extract using the instruction I found in an Oracle Tutorial, but is still does not let the Extract read the log files. How can I fix my database or GoldenGate so that the Extract can access and read the log files.
It is critical that I identify the cause of the issue and how to resolve it - I have searched here, Oracle Support, and the Internet, but I have not found the cause and how to revolve it.
Thanks for any assistance with this issue.