You will need to set the parameter "Enable URL Shortening" to YES in Invitex configuration.
Also you will need to put the "API key for Google URL Shortening" parameter.
Steps for creating API key for Google URL Shortening
- Go to the [url=https://console.developers.google.com/]Google Developers Console[/url].
- Select a project, or create a new one.
- In the sidebar on the left, expand APIs & auth. Next, click APIs. In the list of APIs, make sure the status is ON for the Google URL Shortener API.
- In the sidebar on the left, select Credentials.
- [b]Public API access[/b]:- To create an API key, click Create new Key and select "Server key".