Symptoms
You can't download the server key. When you try to download the server key by clicking on Download server key, nothing happens.
Resolution
The following steps can help you identify and solve the issue:
Ensure that the URL you called matches the MainServerURL in the master.config file.
Ensure that you are using HTTPS or HTTP correctly as specified in the MainServerURL.
<configuration>
<appSettings type="global">
<add key="MainServerPath" value="\\gf-01\GVServer2\"/>
<add key="MainServerURL" value="https://grassfish.com/gf"/>