Incorrect Configuration Settings or Keys
The main issue you will face is having the incorrect configuration settings for the Developers application in the Edlink Dashboard.
ClassLink Client ID
The ClassLink Client ID is the client ID that you use to connect to the server. Example: 3926ecfc408ac9228ab9907e024a517d3309c45b80d5
ClassLink Client Secret
The ClassLink Client Secret is the client secret that you use to connect to the server. Example: b28b5197b9b6daa60abc53f328270f6c
ClassLink OneRoster API Key
The ClassLink OneRoster API Key is the client secret that you use to connect to the server. Example: a6262228-a8bf-4a4c-b5b4-daf1452e7b25