Check whether Task Analytics is installed on your website. There are different methods you can use to verify a correct installation:

This option only works if you’ve installed Task Analytics via a tag manager
When loading Task Analytics via a tag manager, you can use the preview option of your tag management tool to verify the installation. The tag should fire on the pages you want Task Analytics to run on.
Open the DevTools while the page is in focus. Press
Command+Option+I (Mac) or
Control+Shift+I (Windows, Linux) to open DevTools on the page. Select “Network” from the menu and reload your page. After reloading the page, DevTools will show all the files that are being used. If you find
“tm.js” in the list, you know the Task Analytics script is on this page.
More on DevTools (external website)