This setting is required
The Canvas URL is the URL of your school’s Canvas site. It should start with “https” and end with a top level domain (.com, .org, etc.).
To get your Canvas URL, open your Canvas site. Open one of your courses (does not matter which course).
In the address bar of your browser, highlight the URL through to the top level domain (.org, .com, .edu, etc.). Do not include anything after the top level domain. An example is shown below.
Copy the highlighted portion by either pressing the key combination Ctrl+C (Command+C on Mac) or right click and select Copy.
When pasting directly into the Settings sheet you should always use the Paste Values Only option to preserve the formatting of the cells. To do so, click on the cell you want to insert data, right click, select Paste Special > Values Only. Alternatively you can use the keyboard combination Ctrl+Shift+V (Command+Shift+V on Mac).