Oracle Apex Expired Password Issue

I'm dealing with a persistent Oracle Apex connection error marked as "ORA-28001: the password has expired". I have already attempted a password reset without success; it didn't resolve the issue. As for my credentials, I have either default system credentials or custom ones configured, but I'm not certain.

I need a skilled Oracle Apex professional who has vast experience in managing such connection errors and handling both default and custom login credentials. Clarity on the issue and resolution should be provided.

Key Requirements:
- Proficient in Oracle Apex and error resolution
- Experienced in managing both default and custom login credentials
- Able to diagnose the problem and fix the password issue
- Good communication skills to deliver issue updates and solution directions.