In order to use Lightning Components, your org must have My Domain enabled. If you have not done so, you can review this article for more information: Salesforce Help - My Domain
There is an Inspire Planner Task Layout Lightning Record page available with Inspire Planner which already contains the Inspire Planner Lightning components. You can choose to activate it, create your own or edit a Lightning record page you already have.
The Inspire Planner Task Layout Lightning Record page available with Inspire Planner cannot be edited since it's part of a managed package. So you will need to first clone it and then edit the clone.
If you already have a Lighting Record Page setup for Salesforce Tasks or if you are creating your own, you can add Inspire Planner related components by completing the following steps.