Issues with keystore.entry.id

[august-chelli]

Hi,
I am trying to setup this plugin in my dotCMS application and I am getting the below error message when I try to pass the config values to the host.

Error reading Key Store, please check the: keystore.entry.id

Below is the config.
idp.metadata.path=/path/to/idp-metadata.xml
keystore.path=/path/to/file.jks
keystore.password=password

I have tried adding that properties with 'SPKey' and password and yet I get the error. Appreciate any advice on how to fix this.

Thanks.