This issue occurs because Firefox 39, Chrome 45 and later versions consider Diffie-Hellman ciphers as insecure and block them. When using Internet Explorer it allows the page to load, but the log in attempts fails, even after resetting the password to default.
Resolution
To resolve this issue, remove the Diffie-Hellman ciphers from vRealize Orchestrator:
Note: VMware recommends you to take a backup of the vRealize Orchestrator Appliance/ Windows virtual machine installation before making any changes.
Run these commands to create a backup of the vRealize Orchestrator Appliance configuration files:
In a Windows vRealize Orchestrator installation, you can create a backup copy of the files using Windows explorer. The equivalent Windows paths to the server.xml files are:
Program files\Vmware\Orchestrator\app-server\conf\server.xml Program files\Vmware\Orchestrator\configuration\conf\server.xml
In a vRealize Orchestrator Appliance installation, open these two files using a text editor: