Problem embeding Annotation module on DNN page

I have installed the below Extension for DNN site
https://github.com/groupdocs/dnn-groupdocs-annotation

While adding this module to one of my DNN page i am getting the following error

"Sorry, an error occurred while processing the request" (please find enclosed attachment)

I am not sure to have "GroupDocs" library for .Net to make it work. If yes, from where i can download (trial version) it. If no, please suggest what wrong I did which is causing the said issue.

I have already subscribed for the trail version.

Thanking you in anticipation!

Hello,


Thank you for the request. You have done all right but looks like you hasn’t set your document GUID to annotate. For how to get it please check this documentation . This data should be entered in the plugins configs (when you put it on the web page). Also you will need GroupDocs account.

Best regards.