I have a 19c CDB that I want to use as a source. I have used this database before for OGG demo's so in the CDB C##GADMIN exists and in the PDB I have GGADMIN user.
When I add the connection where I provided the SYSDBA credentials and the C##GADMIN credentials

I get this error in the “Check GoldenGate user” step:
Invalid password. GGADMIN exists but password is incorrect.
How can I solve this?