I can't get employee info from my php project. can't create access token web app (Using PHP) in the sandbox.dev.clover.com. I am trying to get in the http://mpo.mr-marketing.co/?merchant_id=9GWBW5Q4ZC871&employee_id=NGWZ3QS041PHM&client_id=NB8ZVR6Z3AS78#access_token=87d67a4b-cd0c-fc80-fc2f-630d17c167c5
This access token or others is not working.
Also, web hooks verification is not working.