The Java SDK has not initialized in the application.
Include desk.sdk.config in system property and call the ZohoOAuthClient.getInstance(); method in the source code.
The grant token has expired.
Exception while fetching access tokens from grant token. Regenerate the grant token and use it to generate a new access token within the stipulated validity time.
The aaaserver.profile.READ scope was not included while generating the grant token.
Invalid OAuth scope. The user must not have specified the aaaserver.profile.READ scope while generating the grant token. Include aaaserver.profile.READ scope and generate a new grant token.
The mandatory configuration keys like client_id, persistence_handler_class, redirectURL, etc., must have been left empty.
Provide the mandatory configuration keys in the property file.