Salesforce recently announced a change to its security policy around Connected Apps, effective August 28th. As a result, Blackthorn recommends verifying that these Connected Apps are installed in your Salesforce orgs.
Blackthorn | Connected App - required to use Blackthorn Events and Blackthorn Payments
Mobile Check-in App - required for using Blackthorn Mobile Check-in
Blackthorn | Mobile Connected App - required for using Blackthorn Mobile Payments
Blackthorn Message - required for using Blackthorn Messaging
Please review the attached pdf for instructions to check that the required Connected Apps are installed and connected correctly.