Check that the name of the variable you’re storing the link in is exactly the same at the end of the first two paths and is the same name as used in the Get Variable module in the last path.
Also, run the scenario and then inspect the value that’s retrieved in the Get Variable module by clicking on the number balloon above that module. You can also check that it’s being set correctly in the Set Variable modules the same way, and that it’s being used correctly in the Pipedrive Update a Person module.