You manually ran the module itself and did not insert a valid URL into the field.
When you run the module by itself it doesn’t get variables from another module. You have to manually input the variables.
Hope this helps! Please create a new thread if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!