The functionality requires access to the API and the web-server with the APIs to be listed in the Remote Site sections of your setup.
You will therefore be required to do and verify 2 things:
1) That the TRIMDA domain is added to your list of Remote Sites
2) That the Installed Package has Unrestricted access to the APIs.
1) Add TRIMDA domain to your list of Remote Sites
Go to: Setup -> Administration Setup -> Security Controls -> Remote Sites Settings
Remote Site Name: TRIMDA
Remote Site URL: https://trimda.na11.visual.force.com
Note: the value na11 above is the domain of the salesforce server where your org is running.
In your case this should be replaced with the domain of your server.
Check out your browser URL for your value.
If you are using a personalized url and your browser displays e.g. https://mydomain.my.salesforce.com, you must include your domain in the Remote Site URL like this: https://mydomain–trimda.na11.visual.force.com
2) Give Installed Package Unrestricted access to the APIs
Go to: Setup -> App Setup -> Installed Packages
DataTrim Dupe Alerts
DataTrim Dupe Alerts – is a salesforce app, which is specialized in performing deduplications on small and large databases, new and existing data, containing lead, contact, account, consumer and candidate records.
Watch the introduction videos below, or contact us to learn more about how we can help you.