Error: "ZenphotoCMS database credentials are incomplete or wrong. Check your config file settings and re-run setup."

I have looked at zenphoto.cfg.php and the user, password, host (localhost), database name, prefix and port are all correct

This is a test server, and the prod server has the same configuration, and works just fine.

If I go to the https://xxx.xxxxx.com/zp-core/admin.php in my browser, I get: "A configuration error occurred.

Please return later."

Any suggestions?

Sorry no idea besides checking the credentials. Do you have a respectively the correct database handler enabled, too?